Simultaneous electrochemical determination of uric acid and hypoxanthine at a TiO₂/graphene quantum dot-modified electrode

• Vu Ngoc Hoang,
• Dang Thi Ngoc Hoa,
• Nguyen Quang Man,
• Le Vu Truong Son,
• Le Van Thanh Son,
• Vo Thang Nguyen,
• Le Thi Hong Phong,
• Ly Hoang Diem,
• Kieu Chan Ly,
• Ho Sy Thang and
• Dinh Quang Khieu

Beilstein J. Nanotechnol. 2024, 15, 719–732, doi:10.3762/bjnano.15.60

• complexes presents an absorption band at 240 nm. The combination of titanium complexes with GQDs resulted in higher adsorption λmax values. XRD patterns of the obtained samples in suspension form are presented in Figure 2. The XRD patterns of TiO2 and TiO2/GQDs suspensions show broad peaks of TiO2 at 2θ

• electrochemical signals is illustrated in Figure 7a. The linear relationship between peak current and square root of scan rate is presented in Figure 7b with the following linear equations: The lines do not pass the origin, indicating that the oxidation process of both URI and HYP are controlled by adsorption

• of URI and HYP of 0.81% and 2.92%, respectively, was chosen to avoid any potential interference effect in real samples. The variation of the potential scan rate during DPV measurement reveals that the electrochemical reactions of URI and HYP are determined by adsorption. Therefore, even at tacc = 0

Laser synthesis of nanoparticles in organic solvents – products, reactions, and perspectives

• Theo Fromme,
• Sven Reichenberger,
• Katharine M. Tibbetts and
• Stephan Barcikowski

Beilstein J. Nanotechnol. 2024, 15, 638–663, doi:10.3762/bjnano.15.54

• alkaline hydrogen evolution reactions [160]. This was partly attributed to an optimization of water adsorption and stabilization of *H and *OH, which leads to an acceleration of reaction kinetics [161]. As the structure and thickness of the carbon shell directly affect the properties of nanoparticles

• the nanoparticle surface during cooling, (ii) decomposition of the solvent molecules on the (hot) particle surface during the process, or (iii) post-process adsorption and accumulation of formed carbon by-products on the particle surface. Theoretical and conceptual approaches to laser-induced solvent

Directed growth of quinacridone chains on the vicinal Ag(35 1 1) surface

• Niklas Humberg,
• Lukas Grönwoldt and
• Moritz Sokolowski

Beilstein J. Nanotechnol. 2024, 15, 556–568, doi:10.3762/bjnano.15.48

• the azimuthal orientation of the molecules, resulting in a preferential growth of the chains in two of the four azimuthal orientations. We explain this by the adaptation of favorable adsorption sites, which involve the replacement of Ag atoms by QA molecules with specific azimuthal orientations at the

• , which can be used to direct the growth of nanostructures of adsorbates. The adsorption at step edges, as opposed to that on the terraces in between, is often favored because the additional interactions between the adsorbate and the atoms of the step edge contribute to the adsorption energy Eads. This

• Figure 2c. We suppose that the adsorption of a QA molecule at the step edge on the upper/lower terrace induces a local change in the electron density at the step edge. This favors a specific adsorption site of a second QA molecule with the same chirality and azimuthal orientation at the step edge on the

Electron-induced deposition using Fe(CO)₄MA and Fe(CO)₅ – effect of MA ligand and process conditions

• Hannah Boeckers,
• Atul Chaudhary,
• Petra Martinović,
• Amy V. Walker,
• Lisa McElwee-White and
• Petra Swiderek

Beilstein J. Nanotechnol. 2024, 15, 500–516, doi:10.3762/bjnano.15.45

Aero-ZnS prepared by physical vapor transport on three-dimensional networks of sacrificial ZnO microtetrapods

• Veaceslav Ursaki,
• Tudor Braniste,
• Victor Zalamai,
• Emil Rusu,
• Vladimir Ciobanu,
• Vadim Morari,
• Daniel Podgornii,
• Pier Carlo Ricci,
• Rainer Adelung and
• Ion Tiginyanu

Beilstein J. Nanotechnol. 2024, 15, 490–499, doi:10.3762/bjnano.15.44

• [43]. The adsorption of oxygen species from the environment on the sample surface promoted by oxygen vacancies results also in a strong interaction between the photoexcited electrons captured by oxygen vacancies and the adsorbed oxygen species. The formation of the SnO2 phase in the prepared aero-ZnS

Photocatalytic degradation of methylene blue under visible light by cobalt ferrite nanoparticles/graphene quantum dots

• Vo Chau Ngoc Anh,
• Le Thi Thanh Nhi,
• Le Thi Kim Dung,
• Dang Thi Ngoc Hoa,
• Nguyen Truong Son,
• Nguyen Thi Thao Uyen,
• Nguyen Ngoc Uyen Thu,
• Le Van Thanh Son,
• Le Trung Hieu,
• Tran Ngoc Tuyen and
• Dinh Quang Khieu

Beilstein J. Nanotechnol. 2024, 15, 475–489, doi:10.3762/bjnano.15.43

• electron microscopy, transmission electron microscopy, ultraviolet–visible diffuse reflectance spectroscopy, Fourier-transform infrared spectroscopy, photoluminescence spectroscopy, vibrating-sample magnetometry, and nitrogen adsorption/desorption isotherms. Cobalt ferrite crystals of around 8–10 nm and

• breaking graphene sheets or from molecules with aromatic structure (fullerenes, starch, and carbohydrates) [3]. However, often GQDs are only stable in solvents, which limits their application in fields that require their solid form, such as in adsorption and photocatalytic, or electrochemical applications

• [4]. Several magnetic nanomaterials that can be recycled and reused have been developed for catalysis or adsorption [5]. Among them are ferrites with the general formula of MFe2O4 (M: Mn, Fe, Co, Ni, Cu, and Zn). They are important magnetic materials. Among the spinel ferrites, CoFe2O4 (CF) is one of

Sidewall angle tuning in focused electron beam-induced processing

• Sangeetha Hari,
• Willem F. van Dorp,
• Johannes J. L. Mulders,
• Piet H. F. Trompenaars,
• Pieter Kruit and
• Cornelis W. Hagen

Beilstein J. Nanotechnol. 2024, 15, 447–456, doi:10.3762/bjnano.15.40

• model based on etching due to SE from the deposit, which was the starting point of the study, was observed. While etching proceeds as expected for very low doses, under-etching was observed at higher doses. An analytical model was developed that nevertheless incorporates the effect of water adsorption

Potential of a deep eutectic solvent in silver nanoparticle fabrication for antibiotic residue detection

• Le Hong Tho,
• Bui Xuan Khuyen,
• Ngoc Xuan Dat Mai and
• Nhu Hoa Thi Tran

Beilstein J. Nanotechnol. 2024, 15, 426–434, doi:10.3762/bjnano.15.38

• used as reducing agent. The synthesis protocol is summarily presented in Figure 1. Also, to characterize our material, UV–vis and XRD measurements were carried out. Figure 2A shows the broad adsorption band indicating the high number of excitons [38] on the surface of Ag NPs due to SPR. The SPR peak is

Classification and application of metal-based nanoantioxidants in medicine and healthcare

• Nguyen Nhat Nam,
• Nguyen Khoi Song Tran,
• Tan Tai Nguyen,
• Nguyen Ngoc Trai,
• Nguyen Phuong Thuy,
• Hoang Dang Khoa Do,
• Nhu Hoa Thi Tran and
• Kieu The Loan Trinh

Beilstein J. Nanotechnol. 2024, 15, 396–415, doi:10.3762/bjnano.15.36

• sites are responsible for the adsorption, activation, and dissociation of the reactants, while the desorption occurs at the gold sites. The combination of multiple metals significantly improves the catalytic efficiency through synergistic effects. The nanocomposites not only disrupt the redox

• ]. The heterostructures increase surface electron deficiency, redox couples, and oxygen vacancies through an intrinsic electric field and lattice mismatch at the metal–semiconductor interface. Thus, a high level of oxygen vacancies enhances the adsorption and activation of oxygen-containing ROS, that is

Vinorelbine-loaded multifunctional magnetic nanoparticles as anticancer drug delivery systems: synthesis, characterization, and in vitro release study

• Zeynep Özcan and
• Afife Binnaz Hazar Yoruç

Beilstein J. Nanotechnol. 2024, 15, 256–269, doi:10.3762/bjnano.15.24

• using a solvothermal method. Subsequently, Fe3O4 NPs were coated with PDA in different ratios. The coating process involved the use of PDA in ratios of 1:1, 2:1, and 4:1, respectively. PDA can undergo polymerization resulting in the adsorption onto the surface of the negatively charged Fe3O4 NPs [22

Multiscale modelling of biomolecular corona formation on metallic surfaces

• Parinaz Mosaddeghi Amini,
• Ian Rouse,
• Julia Subbotina and
• Vladimir Lobaskin

Beilstein J. Nanotechnol. 2024, 15, 215–229, doi:10.3762/bjnano.15.21

• modelling of the interaction between various surfaces, that is (100), (110), and (111), of fcc aluminum with the most abundant milk proteins and lactose. Our approach combines atomistic molecular dynamics, a coarse-grained model of protein adsorption, and kinetic Monte Carlo simulations to predict the

• proteins and lactose adsorption affinities based on their corresponding interaction strength with aluminum surfaces and predicted the content of the naturally forming biomolecular corona. Our comprehensive investigation sheds light on the implications of aluminum in food processing and packaging

• the outer surface of macroscropic and micro- and nano-sized particulate after packaging. It also highlights the dynamic interactions at the bionano interface associated with potential human health hazards. Through biomolecule adsorption, change of conformation, and surface chemistry, foreign materials

Graphene removal by water-assisted focused electron-beam-induced etching – unveiling the dose and dwell time impact on the etch profile and topographical changes in SiO₂ substrates

• Aleksandra Szkudlarek,
• Jan M. Michalik,
• Inés Serrano-Esparza,
• Zdeněk Nováček,
• Veronika Novotná,
• Piotr Ozga,
• Czesław Kapusta and
• José María De Teresa

Beilstein J. Nanotechnol. 2024, 15, 190–198, doi:10.3762/bjnano.15.18

• is dependent on the precursor dynamics (adsorption/desorption rate, diffusion), electron beam (lateral size, electron flux, energy), and scanning parameters (dwell time, refresh time, scanning strategy) [22]. Additionally, residual hydrocarbons inside the scanning electron microscope chamber manifest

• (and their different adsorption mechanisms on quartz or amorphous silica surfaces), which would be responsible for those topographical changes. This hypothesis could also be supported by the fact that OH− groups can easily interact with the H-terminated surface of amorphous silica. However, they are

Nanocarrier systems loaded with IR780, iron oxide nanoparticles and chlorambucil for cancer theragnostics

• Phuong-Thao Dang-Luong,
• Hong-Phuc Nguyen,
• Loc Le-Tuan,
• Xuan-Thang Cao,
• Vy Tran-Anh and
• Hieu Vu Quang

Beilstein J. Nanotechnol. 2024, 15, 180–189, doi:10.3762/bjnano.15.17

• and target efficacy. To increase the blood half-life, stealth materials have been attached to the nanoparticle surface to prevent protein adsorption and immune cell phagocytosis [4]. Most sheath materials are hydrophilic polymers such as poly(vinyl alcohol), poly(ethylene glycol), and poly(ethylene

• DLS and PDI increased to approx. 280 nm and 0.24, respectively. The NPs were still well dispersed in cell culture media; however, the size increase suggested the adsorption of FBS proteins onto the NPs. The SEM results (Figure 1B) showed the actual size of the nanoparticles, which had a round shape of

• -life. When NPs are administered, they come into contact with blood cells and plasma proteins, which may cause adsorption or opsonization by serum proteins [35]. However, these proteins will have a reduced probability of interacting with our negatively charged nanoparticles, as most proteins are

Development and characterization of potential larvicidal nanoemulsions against Aedes aegypti

• Jonatas L. Duarte,
• Leonardo Delello Di Filippo,
• Anna Eliza Maciel de Faria Mota Oliveira,
• Rafael Miguel Sábio,
• Gabriel Davi Marena,
• Tais Maria Bauab,
• Cristiane Duque,
• Vincent Corbel and
• Marlus Chorilli

Beilstein J. Nanotechnol. 2024, 15, 104–114, doi:10.3762/bjnano.15.10

• enhances the properties of the interfacial film, leading to improved adsorption between the oil and water phases and enhancing the stability of nanoemulsions [29]. Previous studies have reported similar findings regarding NEs containing terpenes. Polydispersity index values comparable to those observed in

• , polymers, vehicles, and the presence of electrolytes and their adsorption [32]. The zeta potential values found for the NEs obtained remained stable in the analyzed period, which indicates the stability of the formulation to avoid Ostwald maturation and coalescence of the droplets. Similar zeta potential

Berberine-loaded polylactic acid nanofiber scaffold as a drug delivery system: The relationship between chemical characteristics, drug-release behavior, and antibacterial efficiency

• Le Thi Le,
• Hue Thi Nguyen,
• Liem Thanh Nguyen,
• Huy Quang Tran and
• Thuy Thi Thu Nguyen

Beilstein J. Nanotechnol. 2024, 15, 71–82, doi:10.3762/bjnano.15.7

• bonds, Fourier transform infrared spectroscopy (FTIR) was used to examine the differences in chemical characteristics of BBR-loaded PLA nanofiber scaffolds (Figure 2A). The FTIR spectrum of PLA nanofiber scaffold shows the adsorption peaks at 1751 cm−1 resulting from the stretching vibrations of the C=O

• appeared at 1453 and 1358 cm−1. These aforementioned adsorption characteristics of PLA nanofiber scaffolds were also observed in the FTIR spectra of BBR/PLA and BBR NPs/PLA nanofiber scaffolds. However, there was the addition of an intense broadband at 3361 cm−1 in the FTIR spectrum of the BBR NPs/PLA

Curcumin-loaded nanostructured systems for treatment of leishmaniasis: a review

• Douglas Dourado,
• Thayse Silva Medeiros,
• Éverton do Nascimento Alencar,
• Edijane Matos Sales and
• Fábio Rocha Formiga

Beilstein J. Nanotechnol. 2024, 15, 37–50, doi:10.3762/bjnano.15.4

• favors adsorption by negatively charged cell membranes [103]. Additionally, studies have revealed antileishmanial properties of this polymer against Leishmania parasites, making it attractive for the synthesis of NPs intended for this treatment [56][104]. Therefore, Chaubey and colleagues developed

Hierarchically patterned polyurethane microgrooves featuring nanopillars or nanoholes for neurite elongation and alignment

• Lester Uy Vinzons,
• Guo-Chung Dong and
• Shu-Ping Lin

Beilstein J. Nanotechnol. 2023, 14, 1157–1168, doi:10.3762/bjnano.14.96

• had a rounded bottom. The space between the pillars and holes were around 860 nm and 330 nm, respectively. The wettability of a surface is a good predictor of protein adsorption and bioactivity [20]. For the extracellular matrix protein laminin, good adsorption and cell growth have been found on

• the fluorescence patterns conforming to the structure shapes. Laminin was also successfully coated on the flat areas surrounding the pillars and holes, as shown in the corresponding confocal slices in Supporting Information File 1, Figure S5. O2 plasma treatment of PU enables strong laminin adsorption

• values after plasma treatment, the lower CA [∥] values (<60°) indicate that the surface was hydrophilic enough along the groove direction, and good solution coverage could be achieved during laminin coating. We also confirmed laminin adsorption on the grooved PU samples using confocal fluorescence

Curcumin-loaded albumin submicron particles with potential as a cancer therapy: an in vitro study

• Nittiya Suwannasom,
• Netsai Sriaksorn,
• Chutamas Thepmalee,
• Krissana Khoothiam,
• Ausanai Prapan,
• Hans Bäumler and
• Chonthida Thephinlap

Beilstein J. Nanotechnol. 2023, 14, 1127–1140, doi:10.3762/bjnano.14.93

• recently developed method of encapsulation to produce high-quality submicron albumin particles loaded with riboflavin [28] or doxorubicin [29]. In this work, our aim was to determine the ability of albumin microparticles to load CUR by adsorption and to investigate binding with and release from the

• −1 (C=O and C=C vibrations), and 1435 cm−1 (olefinic C–H bending vibration). The 1309 cm−1 band corresponds to the aromatic C–O stretching vibrations, while the C–O–C stretching vibrations were represented at 1020/951 cm−1 [35]. The characteristic adsorption bands of pure HSA (pink line spectrum) at

• 1644 and 1546 cm−1 indicated the vibration adsorption of amide I (C=O stretching) and amide II (C–N stretching and N–H bending vibrations), respectively. These are the main vibrational bands in the albumin backbone that formed the secondary structure of the protein. It is also seen that the absorption

Properties of tin oxide films grown by atomic layer deposition from tin tetraiodide and ozone

• Kristjan Kalam,
• Peeter Ritslaid,
• Tanel Käämbre,
• Aile Tamm and
• Kaupo Kukli

Beilstein J. Nanotechnol. 2023, 14, 1085–1092, doi:10.3762/bjnano.14.89

• adsorption process and maximized growth during a single cycle. It has, however, to be noted that a clear self-saturating adsorption process of the metal precursor was not recognized because the QCM signal did not fully stabilize at any metal precursor exposure time but continued to increase (Figure 2). A

• the partial decomposition of precursor molecules during the adsorption step of the first precursor and the concurrently intensified release of ligand, that is, iodine molecules, I2. Earlier, analogous studies have been carried out on TiO2 films grown by ALD using TiI4 and O2 as precursors [21

• ]. Plausibly, the initial increase in the GPC up to 300 °C is caused by the gradually enhancing decomposition of metal iodide on the receiving surface, which is not to be regarded as self-saturating adsorption process. Nevertheless, in the adsorption step, more metal is added to the growing layer upon

Recognition mechanisms of hemoglobin particles by monocytes – CD163 may just be one

• Jonathan-Gabriel Nimz,
• Pichayut Rerkshanandana,
• Chiraphat Kloypan,
• Ulrich Kalus,
• Saranya Chaiwaree,
• Axel Pruß,
• Radostina Georgieva,
• Yu Xiong and
• Hans Bäumler

Beilstein J. Nanotechnol. 2023, 14, 1028–1040, doi:10.3762/bjnano.14.85

• emerging hydrogen bonds, altered surface structures, and possible interactions between proteins and particles, in particular polymers such as HbMPs [45][46]. The adsorption of various plasma proteins seems to not only enhance the chance of complement activation but also to promote phagocytosis directly, as

• sequestration as the HSA on the surface of our particles has shown to attenuate the adsorption of plasma proteins [19]. Kloypan et al. observed granulocytic uptake of albumin-based particles in an indirect phagocytosis assay [22]. An observation that was made repeatedly in the present study. Thus, it appears

A visible-light photodetector based on heterojunctions between CuO nanoparticles and ZnO nanorods

• Doan Nhat Giang,
• Nhat Minh Nguyen,
• Duc Anh Ngo,
• Thanh Trang Tran,
• Le Thai Duy,
• Cong Khanh Tran,
• Thi Thanh Van Tran,
• Phan Phuong Ha La and
• Vinh Quang Dang

Beilstein J. Nanotechnol. 2023, 14, 1018–1027, doi:10.3762/bjnano.14.84

• 84.64 s, respectively. The fall time is relatively long because the photodetector is influenced by the persistent photoconductivity (PCC) effect [42]. The origin of PCC are adsorption and desorption processes of oxygen molecules. The re-adsorption rate of oxygen molecules is slow and a stable state is

Metal-organic framework-based nanomaterials for CO₂ storage: A review

• Ha Huu Do,
• Iqra Rabani and
• Hai Bang Truong

Beilstein J. Nanotechnol. 2023, 14, 964–970, doi:10.3762/bjnano.14.79

• , directly linked to the rise in global temperature, has raised significant attention. Carbon capture and storage, particularly in association with adsorbents, has occurred as a pivotal approach to address this pressing issue. Large surface area, high porosity, and abundant adsorption sites make metal

• -organic frameworks (MOFs) promising contenders for CO2 uptake. This review commences by discussing recent advancements in MOFs with diverse adsorption sites, encompassing open metal sites and Lewis basic centers. Next, diverse strategies aimed at enhancing CO2 adsorption capabilities are presented

• ]. Therefore, identification and development of durable and efficient adsorbents are critical to the successful implementation of CCS. Until now, various classes of materials have been investigated for CO2 adsorption, such as covalent organic frameworks, molecular sieves, activated carbon, and metal-organic

Low temperature atomic layer deposition of cobalt using dicobalt hexacarbonyl-1-heptyne as precursor

• Mathias Franz,
• Mahnaz Safian Jouzdani,
• Lysann Kaßner,
• Marcus Daniel,
• Frank Stahr and
• Stefan E. Schulz

Beilstein J. Nanotechnol. 2023, 14, 951–963, doi:10.3762/bjnano.14.78

• deposition is determined by the self-limiting behaviour of surface adsorption, and the reaction is completed in the second half cycle with an additional reactant. Therefore, the growth rate is nearly independent of the cycle time. The upper limit for this self-limiting growth is usually the thermal

Prediction of cytotoxicity of heavy metals adsorbed on nano-TiO₂ with periodic table descriptors using machine learning approaches

• Joyita Roy,
• Souvik Pore and
• Kunal Roy

Beilstein J. Nanotechnol. 2023, 14, 939–950, doi:10.3762/bjnano.14.77

• , leading to bioaccumulation and biological hazards [13]. Heavy metals enter the human body through the consumption of fish and plants [14]. To date, heavy metals are removed through various methods. Among all methods available for removing heavy metals and toxic pollutants from waters, adsorption is the

• internalization and bioaccumulation in the HK-2 cells. The increase in the concentration of heavy metals and their adsorption to nano-TiO2 induces toxicity by increasing the generation of ROS in the HK-2 cells. Comparison with the previous work The present work describes the development of a model for heavy

Upscaling the urea method synthesis of CoAl layered double hydroxides

• Camilo Jaramillo-Hernández,
• Víctor Oestreicher,
• Martín Mizrahi and
• Gonzalo Abellán

Beilstein J. Nanotechnol. 2023, 14, 927–938, doi:10.3762/bjnano.14.76

• ). Finally, textural properties were also evaluated by N2 and CO2 adsorption–desorption isotherms to observe possible changes in the surface area of the samples. Figure 5C shows the N2 isotherms at 77 K. The samples present type-IV adsorption isotherms (according to IUPAC classification) with an H3

• better immobilization of these small anisotropic crystals, precluding any artefacts in the magnetic measurements. The porous texture of all prepared materials was characterized by N2 adsorption at 77 K and CO2 at 273 K in an AUTOSORB-6 apparatus. Prior to the measurements, the samples were degassed for 4

• characterization of CoAl-based LDH samples through (left) SEM and (center) TEM, and (right) the respective average size histograms. AFM images of the samples (A) x1 and (B) x20V. (C) Adsorption isotherms of samples x1 and x20V. Right: Schematic representation of volumetric and mass scale-up approaches. Left: LDH