Mn-doped ZnO nanopowders prepared by sol–gel and microwave-assisted sol–gel methods and their photocatalytic properties

• Cristina Maria Vlăduț,
• Crina Anastasescu,
• Silviu Preda,
• Oana Catalina Mocioiu,
• Simona Petrescu,
• Jeanina Pandele-Cusu,
• Dana Culita,
• Veronica Bratan,
• Ioan Balint and
• Maria Zaharescu

Beilstein J. Nanotechnol. 2024, 15, 1283–1296, doi:10.3762/bjnano.15.104

• substrates [3][15][16]. While traditional heating methods cause inhomogeneities by slowly distributing the heat from the surface to the core of the material or within the entire volume of the solution, microwaves allow for quick and uniform heating because they can penetrate to a depth depending on the

• previous studies, the authors demonstrated that Mn-doped ZnO films exhibit superior optical and piezoelectric properties compared to undoped ZnO, with a more compact microstructure and reduced surface roughness [41]. Building on this foundation, the current article aims to focus on the methods of

• crystallization, consistent with the results from XRD and SEM analyses. Additionally, bands at 3437 and 1613 cm−1 correspond to the vibrational modes of hydroxy groups (OH) bonded to the surface of the ZnO powders. X-ray diffraction The crystalline structure of the samples thermally treated at 500 °C was analyzed

New design of operational MEMS bridges for measurements of properties of FEBID-based nanostructures

• Bartosz Pruchnik,
• Krzysztof Kwoka,
• Ewelina Gacka,
• Dominik Badura,
• Piotr Kunicki,
• Andrzej Sierakowski,
• Paweł Janus,
• Tomasz Piasecki and
• Teodor Gotszalk

Beilstein J. Nanotechnol. 2024, 15, 1273–1282, doi:10.3762/bjnano.15.103

• surface or reduced capacitance) are brought by volumetric, self-standing electronic nanostructures, which provide an experimental basis for their own properties and can serve as building blocks for nanoscale devices, in which phenomena such as giant piezoresistivity, single-electron tunnelling, or field

• electrical measurement equipment. The experiments performed in this way belong to the so-called lab-in-SEM (LiS) technologies. The technology for MEMS fabrication comes from microelectronic surface and bulk micromachining methods [31]. MEMS dimensions are typically defined by photolithography and e-beam

• device, as has been shown in the case of FIB origami [46]. More recently, Masteghin et al. have shown how strain engineering and eigenstrain modification can influence single-material MEMS devices [47]. The exact mechanism depends on the ion and substrate materials, but surface amorphisation or material

Functional morphology of cleaning devices in the damselfly Ischnura elegans (Odonata, Coenagrionidae)

• Silvana Piersanti,
• Gianandrea Salerno,
• Wencke Krings,
• Stanislav Gorb and
• Manuela Rebora

Beilstein J. Nanotechnol. 2024, 15, 1260–1272, doi:10.3762/bjnano.15.102

• across the body surface, maintenance of sensory organs, and displacement behavior in stressful conditions [3]. In insects, the chitinous exoskeleton, with the epidermis below it, forms the integumentary boundary between internal organs and the external environment. The exoskeleton can perform numerous

• tasks through the presence of micro- and nanostructures located on its cuticular surface, serving functions from sensory reception to surface adhesion, air retention, food grinding, thermoregulation, and color production (reviews in [4][5]). The insect cuticle is frequently exposed to a variety of

• antennal surface previously not cleaned with the head in a horizontal position, thus improving the grooming efficiency (Figure 3). The frequency and duration of eye–antennal grooming (R eye-ant plus L eye-ant) (Frequency: T = 26; N = 8; P = 0.029. Duration: T = 26; N = 8; P = 0.029) and of tibia running

The role of a tantalum interlayer in enhancing the properties of Fe₃O₄ thin films

• Hai Dang Ngo,
• Vo Doan Thanh Truong,
• Van Qui Le,
• Hoai Phuong Pham and
• Thi Kim Hang Pham

Beilstein J. Nanotechnol. 2024, 15, 1253–1259, doi:10.3762/bjnano.15.101

• indicates the potential to facilitate the development of novel magnetic and spintronic architectures. Results and Discussion AFM and line-cut method were used to examine the surface morphology and grain sizes of the Fe3O4 films that were formed on SiO2/Si(100), MgO(100), and MgO/Ta/SiO2/Si(100) multilayer

• highest value has the roughest surface among the three. These results indicate that the substrate type does have an effect on grain size and roughness of Fe3O4 thin films. Tantalum in the multilayer structure prevents the diffusion of oxygen atoms from SiO2 into MgO leading to enhanced stability of MgO

• [24][25]. Besides, there was nearly no oxygen diffusion from the Fe3O4 film into the MgO layer, resulting in higher crystallinity and improved grain size as seen in the XRD patterns. Surface properties obtained from Figure 1 are summarized in Table 1. The crystal structures of the Fe3O4 samples on

Dual-functionalized architecture enables stable and tumor cell-specific SiO₂NPs in complex biological fluids

• Iris Renata Sousa Ribeiro,
• Raquel Frenedoso da Silva,
• Romênia Ramos Domingues,
• Adriana Franco Paes Leme and
• Mateus Borba Cardoso

Beilstein J. Nanotechnol. 2024, 15, 1238–1252, doi:10.3762/bjnano.15.100

• [1][2][3][4]. Consequently, the scientific community has focused on improving the targeting of nanoparticles (NPs) to tumor cells through surface functionalization with active groups (e.g., folate, monoclonal antibodies) [5][6][7]. However, according to the literature, only 0.7% of the injected dose

• biological identity of these particles, impairing their therapeutic efficiency [12][13][14][15]. Proteins and other biomolecules can be adsorbed on the surface of NPs (protein corona formation), masking their original functionality and hiding their target ability [16][17][18]. Protein corona can further lead

• at 100 °C and the percentages of carbon, nitrogen, and hydrogen were obtained. It is noteworthy that only the nitrogen percentages were considered for the calculations. The elemental composition of the NP surface was obtained using a K-Alpha XPS (Thermo Fisher Scientific) which operates with Al Kα X

Enhanced catalytic reduction through in situ synthesized gold nanoparticles embedded in glucosamine/alginate nanocomposites

• Chi-Hien Dang,
• Le-Kim-Thuy Nguyen,
• Minh-Trong Tran,
• Van-Dung Le,
• Nguyen Minh Ty,
• T. Ngoc Han Pham,
• Hieu Vu-Quang,
• Tran Thi Kim Chi,
• Tran Thi Huong Giang,
• Nguyen Thi Thanh Tu and
• Thanh-Danh Nguyen

Beilstein J. Nanotechnol. 2024, 15, 1227–1237, doi:10.3762/bjnano.15.99

• temperature, and the reaction time, by using UV–vis spectroscopy. Changes in the physicochemical properties, such as morphology and particle size of AuNPs, were monitored through absorbance and the λmax values of the surface plasmon resonance (SPR) band. Figure 2 illustrates the impact of synthesis conditions

• absorbance declines again at higher temperatures (80 and 90 °C). This decrease in AuNP concentration in the colloidal solution is attributed to nanoparticle aggregation. Elevated temperatures can cause the detachment of the polysaccharide chains from the surface of the AuNPs, promoting the collision and

• mechanism involves the transfer of electrons from BH4− (the electron donor) to the dye (the electron acceptor) facilitated by the surface of the metal nanoparticles [42][43]. Prior to electron transfer, dye and BH4− are adsorbed onto the catalyst surface, as depicted in Figure 5. Consequently, the

Realizing active targeting in cancer nanomedicine with ultrasmall nanoparticles

• André F. Lima,
• Giselle Z. Justo and
• Alioscka A. Sousa

Beilstein J. Nanotechnol. 2024, 15, 1208–1226, doi:10.3762/bjnano.15.98

• reliance on passive targeting, the more complex designs of targeted NPs, the potential for attached functional ligands to increase phagocytic capture and shorten blood circulation time, and the formation of a protein corona that may block the targeting ligand on the particle surface [15][16][17]. Over the

• proteins (Figure 2A) [52][53][54][55][56][57][58]. This occurs because of the small size and high surface curvature of usNPs, which restrict the binding interface for proteins. As a result, protein spreading and denaturation on the usNP surface are minimized, and fewer non-covalent interactions form

• , indicating the formation of a “permanently” bound (hard) protein corona. Moreover, given the appropriate combination of size and surface chemistry, nonspecific interactions between usNPs and proteins can be virtually eliminated (Figure 2C). Notably, achieving highly stable and “stealth” usNPs is feasible

A low-kiloelectronvolt focused ion beam strategy for processing low-thermal-conductance materials with nanoampere currents

• Annalena Wolff,
• Nico Klingner,
• William Thompson,
• Yinghong Zhou,
• Jinying Lin and
• Yin Xiao

Beilstein J. Nanotechnol. 2024, 15, 1197–1207, doi:10.3762/bjnano.15.97

• simulations. Figure 2A,B shows the top view of a single 5 keV ion track. The simulation suggests that any irreversible sample damage that may occur around each ion track is contained well within 5 nm. The surface area around each ion track can be sputtered away during the milling process. Irreversible heat

• numerical heat transfer approach A 3D numerical heat transfer approach was used to include the effect of multiple ion impacts. A time-dependent heat equation was used to assess the effects of global and local heat damage for 5 keV Ga ions when using picoampere and nanoampere ion beam currents. The surface

• when using nanoampere beam currents. The unnaturally smooth surface areas, visible in the cross sections in the SEM image in Figure 4A, indicate that heat damage occurs when using higher ion energies and nanoampere currents for collagen, even when blurring the beam and reducing the overlap. This result

Synthesis, characterization and anticancer effect of doxorubicin-loaded dual stimuli-responsive smart nanopolymers

• Ömür Acet,
• Pavel Kirsanov,
• Burcu Önal Acet,
• Inessa Halets-Bui,
• Dzmitry Shcharbin,
• Şeyda Ceylan Cömert and
• Mehmet Odabaşı

Beilstein J. Nanotechnol. 2024, 15, 1189–1196, doi:10.3762/bjnano.15.96

• , high stability, low toxicity, modifiable hydrophilicity/hydrophobicity, and the possibility of surface functionalization for targeted localization. Polymeric nanoparticles are a versatile approach to drug delivery (DD) with the potential to circumvent barriers associated with negative impacts on

• increasing intensity in DOX-SNPs [33]. The inset in Figure 2 shows DOX-SNPs (red) and pure SNPs (white). Based on these results, the successful incorporation of DOX into SNPs has been demonstrated. Surface morphology and structure of the obtained SNPs were investigated by SEM. As seen in Figure 3, the SNPs

• are spherical. It was also observed that a low proportion of SNPs were around 200–300 nm, and the majority were around 150 nm. SNPs may provide a larger specific surface area, resulting in a high loading capacity for DOX. Also, this property is an advantage regarding the penetration of SNPs into cells

AI-assisted models to predict chemotherapy drugs modified with C₆₀ fullerene derivatives

• Jonathan-Siu-Loong Robles-Hernández,
• Dora Iliana Medina,
• Katerin Aguirre-Hurtado,
• Marlene Bosquez,
• Roberto Salcedo and
• Alan Miralrio

Beilstein J. Nanotechnol. 2024, 15, 1170–1188, doi:10.3762/bjnano.15.95

• C60 [21]. The unmodified fullerene C60 is known as a “free radical sponge” because its double bonds tend to accept free radicals [22]. Because of its size, surface area, and capacity to extinguish or generate reactive oxygen species, C60 is very promising in medicine and clinical therapy [23][24]. It

• bond acceptors sites. It is possible to add two other conditions, namely polar surface area (PSA) ≤ 140 Å2 and less than ten rotatable bonds [31]. Taking advantage of the readiness of these quantities in public datasets, the current study proposes some of these quantities as potentially suitable

• phase of a two-phase octanol–water mixture [39]. Similarly, LogS, related to the water solubility of a substance, was considered. Besides, PSA, as molecular surface associated with charge accumulation due to heteroatoms and polar groups, as well as polarizability (α) associated with the tendency of a

Quantum-to-classical modeling of monolayer Ge₂Se₂ and its application in photovoltaic devices

• Anup Shrivastava,
• Shivani Saini,
• Dolly Kumari,
• Sanjai Singh and
• Jost Adam

Beilstein J. Nanotechnol. 2024, 15, 1153–1169, doi:10.3762/bjnano.15.94

• recombination at the interface of HTL and absorber layer and better surface cleavage because of the thick HTL [55][56]. Figure 7a indicates that 1 nm of HTL yields superior performance in terms of PCE, Voc, Jsc, and FF with values of 28.148%, ≈1.11 V, 28.70 mA·cm−2, and ≈87.77% FF, respectively. Effect of ETL

• of the effective masses. The elastic constant C can be derived by knowing the interatomic force constant, calculated applying a uniaxial strain δ in the direction of lattice vector a: where A0 is the surface area of the unit cell.The deformation potential Edp can be calculated using a band edge

• , ELUMO is the LUMO energy level. The ionization potential is calculated as IP = EVac − EHOMO, where IP, EVac, and EHOMO are ionization potential, vacuum energy level, and HOMO energy level, respectively. The electron affinity at a semiconductor surface is defined as the energy needed to carry an electron

Introducing third-generation periodic table descriptors for nano-qRASTR modeling of zebrafish toxicity of metal oxide nanoparticles

• Supratik Kar and
• Siyun Yang

Beilstein J. Nanotechnol. 2024, 15, 1142–1152, doi:10.3762/bjnano.15.93

• of their unique properties. However, their size, surface area, and reactivity can cause toxicity, potentially leading to oxidative stress, inflammation, and cellular or DNA damage. In this study, a nano-quantitative structure–toxicity relationship (nano-QSTR) model was initially developed to assess

• ; Introduction Nanomaterials, which are defined as materials that fall in the range of 1–100 nanometers two-dimensionally, are commonly used in the fields of biomedicine, catalysis, and electricity because of their stable and unique performance, small size, and large surface area [1]. Nanomaterials encompass a

• of an element. In the context of nanoparticles, the size of the metal atoms directly affects the overall size and surface area of the nanoparticles, which are critical factors in their reactivity and interaction with other materials. The ionic radius is essential for understanding the metal’s

Photocatalytic methane oxidation over a TiO₂/SiNWs p–n junction catalyst at room temperature

• Qui Thanh Hoai Ta,
• Luan Minh Nguyen,
• Ngoc Hoi Nguyen,
• Phan Khanh Thinh Nguyen and
• Dai Hai Nguyen

Beilstein J. Nanotechnol. 2024, 15, 1132–1141, doi:10.3762/bjnano.15.92

• forces generated charge carriers to move in opposite directions and suppresses charge recombination. Besides, surface morphology and optical properties of the the p–n TiO2/SiNWs catalyst are also beneficial for the photocatalytic activity. It is expected that the results of this study will provide

• configuration advantages [34][35][36]. However, the wetness impregnation synthesis of those powder co-catalysts faces the issues of low surface area, low reproducibility, and difficult control of large-scale production. Therefore, the development of novel catalysts with unique morphologies by using precise

• tools is extremely essential and important [37][38][39]. Herein, we constructed a robust p–n junction catalyst by atomic layer deposition (ALD) of TiO2 thin films on a p-type SiNW substrate for enhancing the photocatalytic efficiency in CH4 oxidation. Pristine p-Si wafers have limited surface area and

Local work function on graphene nanoribbons

• Daniel Rothhardt,
• Amina Kimouche,
• Tillmann Klamroth and
• Regina Hoffmann-Vogel

Beilstein J. Nanotechnol. 2024, 15, 1125–1131, doi:10.3762/bjnano.15.91

• difference (LCPD) between a probe tip and a surface, related to the work function. Here we use this technique to map the LCPD of graphene nanoribbons grown on a Au(111) substrate. The LCPD data shows charge transfer between the graphene nanoribbons and the gold substrate. Our results are corroborated with

• bandgap [12], which is also related to the work function. GNRs can be synthesized with atomic precision in an ultrahigh-vacuum environment using on-surface synthesis [13]. This synthesis is well known on coinage metals, namely, Cu, Ag, and Au, which possess a high electron density. To study these unique

• difference of graphene nanoribbons fabricated by on-surface synthesis on Au(111). The GNRs can be clearly discerned from the substrate through their topography, but also through their contact potential difference. GNRs have a measured contact potential that is about 100 meV smaller than that of a Au

Direct electron beam writing of silver using a β-diketonate precursor: first insights

• Katja Höflich,
• Krzysztof Maćkosz,
• Chinmai S. Jureddy,
• Aleksei Tsarapkin and
• Ivo Utke

Beilstein J. Nanotechnol. 2024, 15, 1117–1124, doi:10.3762/bjnano.15.90

• the growth of silver particles on the surface. While these effects complicate the application for 3D printing, the unique deposit structure with a thin, compact silver film beneath the deposit body is interesting from a fundamental point of view and may offer additional opportunities for applications

• challenges in device design and fabrication. Accordingly, various methods to improve purity during [15][16][17][18] or after deposition [18][19][20][21][22] were developed. For plasmonic applications, a metallic surface layer with a thickness exceeding the skin depth is sufficient to obtain the desired

• expense of a reduced shape fidelity [9]. This is also true for the recently established direct electron beam writing of silver, which demonstrated high purities of up to 74 atom % [27] but with large surface roughness and low vertical growth rates [28][29][30]. For silver, only few solid metalorganic

Recent updates in applications of nanomedicine for the treatment of hepatic fibrosis

• Damai Ria Setyawati,
• Fransiska Christydira Sekaringtyas,
• Riyona Desvy Pratiwi,
• A’liyatur Rosyidah,
• Rohimmahtunnissa Azhar,
• Nunik Gustini,
• Gita Syahputra,
• Idah Rosidah,
• Etik Mardliyati,
• Tarwadi and
• Sjaikhurrizal El Muttaqien

Beilstein J. Nanotechnol. 2024, 15, 1105–1116, doi:10.3762/bjnano.15.89

• application of nanoscale systems with unique physicochemical properties, including small size, large specific surface area, high reactivity, and quantum effects of the nanoparticles (NPs) [1][2]. Nanomedicine is specifically designated for therapeutics (drug delivery), diagnostics, and imaging, as well as for

• impermeable basal lamina allow for rapid accumulation of NPs in the liver through passive targeting [24]. Complementing certain anatomic or pathophysiological features of the target organ, such passive accumulation also relies on nanoparticle properties including size, shape, surface charge, and

• dynamic endothelial fenestrations to reach HSCs in the perisinusoidal space or even hepatocytes [24][29]. Smaller nanocarriers (10–20 nm) can be taken up rapidly by hepatocytes [32]. Besides the size of the administered nanocarriers, surface properties also play an important role in dictating

Unveiling the potential of alginate-based nanomaterials in sensing technology and smart delivery applications

• Shakhzodjon Uzokboev,
• Khojimukhammad Akhmadbekov,
• Ra’no Nuritdinova,
• Salah M. Tawfik and
• Yong-Ill Lee

Beilstein J. Nanotechnol. 2024, 15, 1077–1104, doi:10.3762/bjnano.15.88

• sustain the medicine or gene effect in targeted tissues. This sustained release of medication extends the duration of the effect of the drug, ensuring optimal treatment efficacy. Additionally, biopolymeric nanoparticles can carry various functional groups on their surface enabling targeted drug delivery

• biopolymeric nanoparticles, providing valuable information about their physical and chemical properties. These techniques allow researchers to understand the structure, stability, surface properties, and drug release behavior of biopolymeric nanoparticles, enabling them to optimize drug delivery strategies and

• ensure efficacy and safety [58]. The most crucial characteristics of nanoparticles are particle size, morphology, zeta potential, and surface area. Morphology of nanoparticles: There are many tools available for determining the morphology of nanomaterials. However, the most commonly used methods are

Signal generation in dynamic interferometric displacement detection

• Knarik Khachatryan,
• Simon Anter,
• Michael Reichling and
• Alexander von Schmidsfeld

Beilstein J. Nanotechnol. 2024, 15, 1070–1076, doi:10.3762/bjnano.15.87

• displacement of a (quasi) harmonically oscillating microcantilever, acting as one mirror of the interferometer, while the second mirror is the even surface of an optical fiber delivering the light to the microcantilever [5][6][7][8][9][10]. As illustrated in Figure 1, interference occurs in the optical fiber

• curve, where the slope of IM(d) is a maximum. Such an adjustment facilitates a most sensitive displacement detection. Note, that it is not possible to adjust the interferometer to d0 with a small number m because of limitations in positioning the fiber end face parallel to the cantilever surface. Upon

• excitation, the freely oscillating cantilever exhibits a harmonic displacement q(t) as a function of time. If a tip–surface force Fts is present, this will introduce a slight anharmonicity, and there will be a static displacement qs [13]. Within the harmonic approximation, which is well justified for small

Effect of wavelength and liquid on formation of Ag, Au, Ag/Au nanoparticles via picosecond laser ablation and SERS-based detection of DMMP

• Sree Satya Bharati Moram,
• Chandu Byram and
• Venugopal Rao Soma

Beilstein J. Nanotechnol. 2024, 15, 1054–1069, doi:10.3762/bjnano.15.86

• was meticulously evaluated by analyzing the ablation rates, surface plasmon resonance peak positions, and particle size distributions of the obtained colloids. The nanoparticles (NPs) were characterized using the techniques of UV–visible absorption, transmission electron microscopy, and energy

• -dispersive X-ray spectroscopy. Furthermore, NPs of various sizes ranging from 6 to 35 nm were loaded onto a filter paper by a simple and effective drop-casting approach to achieve flexible surface-enhanced Raman spectroscopy (SERS) substrates/sensors. These substrates were tested using a simple, portable

• decomposition of the metal surface. This results in an explosive ejection of vapor and liquid from the surface. The metal plume cannot freely expand in water and is slowed down, forming a hot metal layer at the water interface. The hot metal layer heats the water to a supercritical state, mixing metal atoms

Interface properties of nanostructured carbon-coated biological implants: an overview

• Mattia Bartoli,
• Francesca Cardano,
• Erik Piatti,
• Stefania Lettieri,
• Andrea Fin and
• Alberto Tagliaferro

Beilstein J. Nanotechnol. 2024, 15, 1041–1053, doi:10.3762/bjnano.15.85

• environments represented by implant–tissue interfaces [18] through the tuning of different parameters (i.e., surface roughness and potential as well as hydrophobicity). Cells and biomolecules can selectively adhere to or be repelled from artificial implanted surfaces, triggering several metabolic pathways of

• structural polymorphism [40] (arrangement, number, and order of layers), the electronic coupling between different layers, and the matrix in which graphene is embedded [41]. Indeed, the matrix plays a pivotal role owing to the ultimate surface-to-volume ratio and the poor electrostatic screening displayed by

• they still remain far below those of graphene. Last, GO and rGO show good interactions with polymeric matrices thanks to specific surface functionalizations [51]. Carbon nanotubes CNTs are an allotropic state of carbon discovered in the middle of the 20th century [52][53][54][55], which became famous

Bolometric IR photoresponse based on a 3D micro-nano integrated CNT architecture

• Yasameen Al-Mafrachi,
• Sandeep Yadav,
• Sascha Preu,
• Jörg J. Schneider and
• Oktay Yilmazoglu

Beilstein J. Nanotechnol. 2024, 15, 1030–1040, doi:10.3762/bjnano.15.84

• our bolometer used pristine CNTs. However, the high surface-to-volume ratio of CNTs is very advantageous for further coating with, for example, VOx or ZnO. Thus, this architecture provides a platform technology to increase the responsivity of the fabricated new 3D-based bolometer devices. Additionally

Entry of nanoparticles into cells and tissues: status and challenges

• Kirsten Sandvig,
• Tore Geir Iversen and
• Tore Skotland

Beilstein J. Nanotechnol. 2024, 15, 1017–1029, doi:10.3762/bjnano.15.83

• of new types of NPs, there is a knowledge gap when it comes to our understanding of the interaction of NPs with both cells and tissues. However, it is well known that NP properties, such as surface charge, size, and the material they are composed of can affect cellular uptake, biodistribution, and

• chances that also other processes than endocytosis, such as recycling, degradation, and signaling are also regulated by cell density. In studies of uptake and transport of NPs, it is essential to determine whether the particle is in a sealed vesicle or whether it is still at the cell surface but present

• in an invagination of the cell. This can be performed by different methods. If electron microscopy (EM) is used, it is important that serial sectioning is performed. Otherwise, one may see a particle which is apparently internalized, since it is far from the cell surface, but it might still be in an

Ca_n neutral clusters: a two-step G₀W₀ and DFT benchmark

• Sunila Bakhsh,
• Sameen Aslam,
• Muhammad Khalid,
• Muhammad Sohail,
• Sundas Zafar,
• Sumayya Abdul Wadood,
• Kareem Morsy and
• Muhammad Aamir Iqbal

Beilstein J. Nanotechnol. 2024, 15, 1010–1016, doi:10.3762/bjnano.15.82

• cluster. Ca8 is a pentagonal bipyramid structure with a capped atom, which disrupts its symmetry from a perfect pentagonal bipyramid. This symmetry breaking can also be a possible reason, as it might generate a structure with increased surface strain or less favorable bonding environments. Apart from this

Atomistic insights into the morphological dynamics of gold and platinum nanoparticles: MD simulations in vacuum and aqueous media

• Evangelos Voyiatzis,
• Eugenia Valsami-Jones and
• Antreas Afantitis

Beilstein J. Nanotechnol. 2024, 15, 995–1009, doi:10.3762/bjnano.15.81

• multifaceted crystal surface, and their shape remains almost constant regardless of temperature variations. The smaller NPs have a smoother and more spherical surface, and their shape varies greatly with temperature. By studying the variation of nano-descriptors commonly employed in QSAR models, a qualitative

• attributable to their distinctive properties, including superparamagnetism, piezoelectricity, certain optical characteristics [9][10][11][12][13], and the enormously high surface-to-volume ratio. These special properties derive from their small size, rather than their chemical composition. Given the broad

• for NPs is the consistency in their shape, surface characteristics, and crystallinity. Nevertheless, developing straightforward and widely applicable approaches to crystallize or melt NPs uniformly, with precise control, remains a significant challenge [25]. For instance, it has been shown that atomic

Recent progress on field-effect transistor-based biosensors: device perspective

• Billel Smaani,
• Fares Nafa,
• Mohamed Salah Benlatrech,
• Ismahan Mahdi,
• Hamza Akroum,
• Mohamed walid Azizi,
• Khaled Harrar and
• Sayan Kanungo

Beilstein J. Nanotechnol. 2024, 15, 977–994, doi:10.3762/bjnano.15.80

• [27][28], surface-enhanced Raman spectroscopy [29][30], microfluidic-coupled biochip [31], electrochemical [32], and field-effect transistor (FET)-based biosensors [33]. Biosensors offer several distinct benefits for virus recognition, including higher selectivity through improved target receptors and

• . The first transduction mechanism is known as charge modulation, in which charged biomolecule species bind to the surface of the gate insulator and modify the charge density of the channel surface, and thus the surface conductivity by Coulomb interaction. This acts as a gating mechanism, and

• flexibly adjusted through layout design, there is a broader enhancement space for biosensor design [71]. Moreover, owing to the larger channel surface and wider channel, biomolecules can be easily immobilized in the nanocavity. Consequently, the VS NS FET-based biosensor provides higher sensitivity. 2.1.3