Gold nanomakura: nanoarchitectonics and their photothermal response in association with carrageenan hydrogels

• Nabojit Das,
• Vikas,
• Akash Kumar,
• Sanjeev Soni and
• Raja Gopal Rayavarapu

Beilstein J. Nanotechnol. 2024, 15, 678–693, doi:10.3762/bjnano.15.56

• nanoparticles before and after their incorporation into k-CG were checked for photothermal response. On the contrary, AuNRs after incorporation into k-CG hydrogels showed a small increase in temperature as compared to that of AuNMs upon laser irradiation. Therefore, the intactness and ability of AuNMs as

• ) equipped with a solid-state laser operating at 532 nm with a power of 0.7 mW, a grating of 600 L/mm, and an objective lens of 50× (Zeiss) was used in noncontact (tapping) mode. The cantilevers of length 125 μm and width 4 μm were used at a resonance frequency of 142 Hz and at a constant force of 42 N/m

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

• 23284, USA 10.3762/bjnano.15.54 Abstract Laser synthesis and processing of colloids (LSPC) is an established method for producing functional and durable nanomaterials and catalysts in virtually any liquid of choice. While the redox reactions during laser synthesis in water are fairly well understood

• review also includes findings that are specific to the LSPC method variants laser ablation (LAL), fragmentation (LFL), melting (LML), and reduction (LRL) in organic liquids. A particular focus will be set on permanent gases, liquid hydrocarbons, and solid, carbonaceous species generated, including the

• formation of doped, compounded, and encapsulated nanoparticles. It will be shown how the choice of solvent, synthesis method, and laser parameters influence the nanostructure formation as well as the amount and chain length of the generated polyyne by-products. Finally, theoretical approaches to address the

Exfoliation of titanium nitride using a non-thermal plasma process

• Priscila Jussiane Zambiazi,
• Dolores Ribeiro Ricci Lazar,
• Larissa Otubo,
• Rodrigo Fernando Brambilla de Souza,
• Almir Oliveira Neto and
• Cecilia Chaves Guedes-Silva

Beilstein J. Nanotechnol. 2024, 15, 631–637, doi:10.3762/bjnano.15.53

• with a 785 nm laser source. These analytical techniques provided comprehensive insights into the structure and properties of the synthesized TiN nanosheets. Results and Discussion Figure 2 shows the XRD patterns of both the bulk material and the TiN powder obtained from the non-thermal plasma process

Comparative analysis of the ultrastructure and adhesive secretion pathways of different smooth attachment pads of the stick insect Medauroidea extradentata (Phasmatodea)

• Julian Thomas,
• Stanislav N. Gorb and
• Thies H. Büscher

Beilstein J. Nanotechnol. 2024, 15, 612–630, doi:10.3762/bjnano.15.52

• stick insect Medauroidea extradentata using scanning electron microscopy, micro-computed tomography, light microscopy, and confocal laser scanning microscopy. Our observations revealed structural differences between both attachment pads, reflecting their distinct functionality. Furthermore, our results

• relatively large adhesive organs that bear no further surface microstructures [47][55][56] and because the droplet morphology of its tarsal secretion has been recently analysed [28][38][47][55][56]. Combining different imaging techniques, including scanning electron microscopy (SEM), confocal laser scanning

• obtained using a scanning electron microscope (TM 3000, Hitachi High-Technologies Corp, Tokyo, Japan) at 3 kV acceleration voltage. The recorded images were stitched, merged, and processed using the software Photoshop CS6 (Adobe Systems Inc., San Jose, CA, USA). Confocal laser scanning microscopy Whole

AFM-IR investigation of thin PECVD SiO_x films on a polypropylene substrate in the surface-sensitive mode

• Hendrik Müller,
• Hartmut Stadler,
• Teresa de los Arcos,
• Adrian Keller and
• Guido Grundmeier

Beilstein J. Nanotechnol. 2024, 15, 603–611, doi:10.3762/bjnano.15.51

• Photothermal AFM-IR nanospectroscopy is a technique that combines the chemical information from infrared (IR) spectroscopy with the high spatial resolution of atomic force microscopy (AFM). For this, the sample is illuminated with a tunable IR laser [1]. When a suitable IR wavelength is chosen, resonant

• correlation between the IR wavelength of the laser and the thermal expansion of the material enables the recording of IR absorption spectra with this technique which correspond to the spectra of bulk IR spectroscopy [2][3][4]. Compared to ATR-FTIR spectroscopy, AFM-IR provides a drastic improvement in terms

• of spatial resolution. In ATR-IR spectroscopy, the resolution is theoretically limited by λ/2, which corresponds to several µm [3]. In contrast, the development of new and powerful tunable IR laser sources, such as optical parametric oscillator (OPO) and quantum cascade lasers (QCL), enabled a

Cholesterol nanoarchaeosomes for alendronate targeted delivery as an anti-endothelial dysfunction agent

• Horacio Emanuel Jerez,
• Yamila Roxana Simioni,
• Kajal Ghosal,
• Maria Jose Morilla and
• Eder Lilia Romero

Beilstein J. Nanotechnol. 2024, 15, 517–534, doi:10.3762/bjnano.15.46

• 33342 for 10 min at RT. After staining, the membranes were separated from the inserts and were mounted on slides using a motion mounting medium. A Leica laser-scanning spectral confocal microscope TCS SP8 (Leica Microsystems, Wetzlar, Germany) was used. Image processing was performed using ImageJ

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

• in the technological procedures of 4 and 8 h were measured at temperatures from 300 to 20 K under excitation with the 325 nm laser line (3.81 eV), which corresponds to excitonic resonances in ZnS, see Figure 4. The spectra of both samples consist of two broad PL bands centered around 2.4 and 2.9–3.0

• measured at low temperature in the near-bandgap region, as shown in Figure 6. Apart from that, a narrow emission peak is observed at 3.726 eV. This peak is assigned to multiphonon resonant Raman scattering (RRS) in ZnS since the quantum energy difference between the excitation laser line (3.814 eV) and the

• peak position (3.726 eV) is nearly equal to the 2LO phonon energy in ZnS. The non-resonant Raman scattering measured with the excitation by the 785 nm laser line, shown in the inset of Figure 6b, clearly indicates the presence of a Raman scattering peak at 350 cm−1 (43 meV), which corresponds to the LO

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

• located at 390 nm, which is suitable for SERS applications with 532 nm laser excitation. Besides, the shape of the UV–vis spectrum is in accordance with Mie scattering theory calculations, as reported in [39], proving the existence of Ag NPs in the solution. Moreover, the XRD pattern of the thin film

• and let dry naturally before the laser excitation. The SERS mapping shown in Figure 6C shows an even distribution of high intensity over the entire considered surface. This shows that the Ag NPs-DES coating has good consistency despite the different analytes. DES is supposed to play a crucial role in

• each measurement). The analyte was then dried at room temperature, and the Raman spectra were recorded via laser excitation at 532 nm. Other investigations on the SERS performance of our sample were also carried out, including Raman mapping, signal consistency, uniformity, and selectivity. Instrument

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

• ]. PDA-Ru nanoparticles could degrade Aβ fibrils under low-power laser irradiation because of their great photothermal effect. Moreover, PDA-Ru nanoparticles could decompose H2O2 owing to their strong CAT activity. PDA-Ru nanoparticles effectively improved memory capacity and decreased neuroinflammation

• collaborators synthesized mesoporous carbon nanospheres (PMCSs) derived from a MOF precursor, exhibiting dual photodynamic and photothermal characteristics. Utilizing this framework, concentration and temperature at thrombotic sites were elevated significantly upon local irradiation (808 nm laser), resulting in

On the mechanism of piezoresistance in nanocrystalline graphite

• Sandeep Kumar,
• Simone Dehm and
• Ralph Krupke

Beilstein J. Nanotechnol. 2024, 15, 376–384, doi:10.3762/bjnano.15.34

• substrate at 4000 rpm to grow NCG on both sides of the glass. The substrate was then loaded into the vacuum furnace and treated similarly. Raman measurements Raman measurements were done using a 100× objective at 0.6 mW laser power for 60 s integration time for each measurement. The same area on the NCG

Determining by Raman spectroscopy the average thickness and N-layer-specific surface coverages of MoS₂ thin films with domains much smaller than the laser spot size

• Felipe Wasem Klein,
• Jean-Roch Huntzinger,
• Vincent Astié,
• Damien Voiry,
• Romain Parret,
• Houssine Makhlouf,
• Sandrine Juillaguet,
• Jean-Manuel Decams,
• Sylvie Contreras,
• Périne Landois,
• Ahmed-Azmi Zahab,
• Jean-Louis Sauvajol and
• Matthieu Paillet

Beilstein J. Nanotechnol. 2024, 15, 279–296, doi:10.3762/bjnano.15.26

• injection pulsed-pressure chemical vapor deposition (DLI-PP-CVD). Such samples are constituted of nanoflakes (with a lateral size of typically 50 nm, i.e., well below the laser spot size), with possibly a distribution of thicknesses and twist angles between stacked layers. As an essential preliminary, we

• vary. These samples thus have characteristics, especially thickness inhomogeneities smaller than the laser spot size, that differ from the ones used to establish Raman spectroscopy-based MoS2 layer counting methods [26][28][29][30][31][32][33]. In this context, the primary purpose of this work is to

• develop and validate an approach for determining the average thickness of such sub-laser spot size inhomogeneous MoS2 thin films using Raman spectroscopy. First, we reassess here as a ground work the information that can be derived from the Raman spectra of MoS2 flakes for the evaluation of their

Ultrasensitive and ultrastretchable metal crack strain sensor based on helical polydimethylsiloxane

• Shangbi Chen,
• Dewen Liu,
• Weiwei Chen,
• Huajiang Chen,
• Jiawei Li and
• Jinfang Wang

Beilstein J. Nanotechnol. 2024, 15, 270–278, doi:10.3762/bjnano.15.25

• and stretchable strain sensors with an impressive GF exceeding 42000 at a strain level of 150% [24]. These sensors were created by utilizing precisely controlled cracks in CNT films, which were formed through laser engraving of a CNT paper. In their study, Lee et al. have developed a strain sensor

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

• cancer therapy agent, is included in the nanocomposite structure, and in vitro drug release studies under different pH conditions (pH 5.5 and 7.4) and photothermal activity at 808 nm NIR laser irradiation are investigated. The comprehensive integration of precise multifunctional nanoparticles design

• the heat produced by nanostructures under NIR laser irradiation [17][18]. Compared to traditional treatments, photothermal therapy allows for increased drug release and is less cytotoxic to healthy tissues [19]. It is a minimally invasive technique that offers the advantage of rapid recovery [20

• laser-driven photothermal agent [25]. However, it is challenging to completely eradicate solid tumors using PTT alone because of light scattering and limited absorption in tumor tissues. For this purpose, various modifications have been employed for passive tumor targeting. PEGylation, which involves

Ion beam processing of DNA origami nanostructures

• Leo Sala,
• Agnes Zerolová,
• Violaine Vizcaino,
• Alain Mery,
• Alicja Domaracka,
• Hermann Rothard,
• Philippe Boduch,
• Dominik Pinkas and
• Jaroslav Kocišek

Beilstein J. Nanotechnol. 2024, 15, 207–214, doi:10.3762/bjnano.15.20

• regimes become the basis of commonly used material processing techniques such as high-energy ion implantation, widely applied in laser, detector, and semiconductor industries [30]. Finally, at low (keV) energies, the interaction of heavy ions is dominated by nuclear stopping, which is used in the most

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

• for a monolayer of graphene onto SiO2) measured using AFM, shown in the insets of Figure 1D, agree with the data obtained in studies presenting femtosecond laser thinning of graphene [28]. In addition to the region located below the baseline, we also observe an elevation in the central part of the

• confocal Raman Alpha 300 M+ from WITec, which combines a Raman spectrograph with a confocal microscope. A laser with a 532 nm wavelength, spot size of 1 μm, and power fixed at 1 mW was used to avoid sample heating. The confocal microscope gives a higher lateral resolution than conventional optical

CdSe/ZnS quantum dots as a booster in the active layer of distributed ternary organic photovoltaics

• Gabriela Lewińska,
• Piotr Jeleń,
• Zofia Kucia,
• Maciej Sitarz,
• Łukasz Walczak,
• Bartłomiej Szafraniak,
• Jerzy Sanetra and
• Konstanty W. Marszalek

Beilstein J. Nanotechnol. 2024, 15, 144–156, doi:10.3762/bjnano.15.14

• monocrystalline silicon. A WITec Alpha 300 M+ spectrometer with a 488 nm laser, 600 groove grating, and a 100× ZEISS objective was used for Raman measurements. The samples were deposited on a glass substrate. Ultraviolet photoelectron spectroscopy (UPS) was conducted in an ultrahigh-vacuum chamber with a base

• ultraviolet with a small exponentially decreasing band up to 500–600 nm (Figure 2). The absorption band maximum is about 260 nm in the solid state (quartz was used as reference) and 330 nm in chloroform solution. The photoluminescence spectra, excited by a 405 nm laser, are shown in Figure 3. This type of

Enhanced feedback performance in off-resonance AFM modes through pulse train sampling

• Mustafa Kangül,
• Navid Asmari,
• Santiago H. Andany,
• Marcos Penedo and
• Georg E. Fantner

Beilstein J. Nanotechnol. 2024, 15, 134–143, doi:10.3762/bjnano.15.13

• to add a second piezo on the Z axis with a higher resonance frequency [23]. Another approach is direct actuation of the cantilever, as it typically possesses a higher resonance frequency [24][25][26]. In particular, photothermal actuation, which utilizes laser-induced heating of the cantilever, has

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

• were evaluated over a period of 60 days using dynamic light scattering, and the zeta potential was determined via electrophoretic mobility in a Zetasizer 3000 HSA (Malvern Instruments) device, using a 10 mW HeNe laser operated at 633 nm with a detection angle of incidence of 173° at 25 °C. Data

• analysis was performed in automatic mode. The NEs were diluted in deionized water (1:25) before the analysis. Nanoparticle tracking analysis Nanoparticle tracking analysis was performed in a NanoSight NS300 (Malvern Instruments, United Kingdom) apparatus equipped with a sample chamber and a 638 nm laser

Fluorescent bioinspired albumin/polydopamine nanoparticles and their interactions with Escherichia coli cells

• Eloïse Equy,
• Jordana Hirtzel,
• Sophie Hellé,
• Béatrice Heurtault,
• Eric Mathieu,
• Morgane Rabineau,
• Vincent Ball and
• Lydie Ploux

Beilstein J. Nanotechnol. 2023, 14, 1208–1224, doi:10.3762/bjnano.14.100

• at excitation and emission wavelengths corresponding to FITC and RhBITC dyes. It was also impossible to identify the specific fluorescent signal emitted by Ox-BSA/PDA NPs in absence of an adequate laser for the excitation of Ox-BSA/PDA NPs at 285 nm. Under excitation with a higher wavelength (405 nm

• obtained with the high-resolution confocal laser scanning microscope (CLSM, Stellaris 5, Leica Biosystems, Wetzlar, Germany). In all experiments with dyes (FITC-BSA/PDA NPs, RhBITC-BSA/PDA NPs, free FITC, and free RhBITC in equivalent concentrations), the fluorescence signal related to RhBITC or FITC was

• , close to the wavelength of the laser used in the device (633 nm). Samples were diluted to get an absorption below 0.1. Size distribution results are given in intensity and can be expressed also in volume or number. Standard deviations of the sample’s mean hydrodynamic diameters as well as the

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

• microenvironment. While several of these focused on stem cell differentiation [9][10], a couple of studies explored their effects on axonal guidance. Lee et al. [11] found that nanorough microridges composed of laser-patterned Al/Al2O3 nanowires increase cell attachment and effectively guide dorsal root ganglia

• fabrication. For instance, traditional techniques, such as electron-beam lithography, laser writing, and cleanroom photolithography, have flexibility in design but require costly equipment [13][14]. Relatively cheaper techniques, such as anodization, electroplating, and electrospinning, are limited by the

A multi-resistance wide-range calibration sample for conductive probe atomic force microscopy measurements

• François Piquemal,
• Khaled Kaja,
• Pascal Chrétien,
• José Morán-Meza,
• Frédéric Houzé,
• Christian Ulysse and
• Abdelmounaim Harouri

Beilstein J. Nanotechnol. 2023, 14, 1141–1148, doi:10.3762/bjnano.14.94

• voltage of +1 V). The origin of I–V curves not going through zero is commonly associated with photovoltaic effects, which was indeed validated by the disappearance of this observation when the laser of the AFM setup was switched off. Although, a photovoltaic effect might be intriguing in current

• core. Thus, the photovoltage effect observed in our paper is solely related to the tip apex and does not depend on the measured sample. We were able to confirm this aspect by running I–V curves using new probes with intact apexes, which showed no shift around zero even with the AFM laser on. This

• the resistance reference (reported in Table 1) and the measurement repeatability. In the insert, the products Ioffset·Ri are given in millivolts, where Ioffset denotes the current offset observed at zero bias voltage on the I–V curves, when the AFM laser is turned on (full circles) and off (full

Dual-heterodyne Kelvin probe force microscopy

• Benjamin Grévin,
• Fatima Husainy,
• Dmitry Aldakov and
• Cyril Aumaître

Beilstein J. Nanotechnol. 2023, 14, 1068–1084, doi:10.3762/bjnano.14.88

• modulation (period 2π/ωmod, duty ratio fixed at the user convenience), which is used to pump the sample (via a digital modulated laser source, or a direct electrical connection to the sample for tests under electrical pumping). The second channel generates a sinusoidal reference signal at nωmod. The

• + 180° (n_1 sidebands). An external fibre-coupled laser source (Omicron Laserage, PhoxX+ at 515 nm) was used for sample illumination through an optical viewport of the UHV AFM chamber. Samples can be illuminated either from the front or from the back using sample holders with on-board mirrors [3]. The

• latter configuration is used in the case of organic BHJ thin films (processed on transparent substrates, i.e., glass coated with indium thin oxide). The light intensity is adjusted using the laser power control and optical density filters. In the following, for each measurement, the optical power Popt

Spatial mapping of photovoltage and light-induced displacement of on-chip coupled piezo/photodiodes by Kelvin probe force microscopy under modulated illumination

• Zeinab Eftekhari,
• Nasim Rezaei,
• Hidde Stokkel,
• Jian-Yao Zheng,
• Andrea Cerreta,
• Ilka Hermes,
• Minh Nguyen,
• Guus Rijnders and
• Rebecca Saive

Beilstein J. Nanotechnol. 2023, 14, 1059–1067, doi:10.3762/bjnano.14.87

• each function of the components on the overall motion behavior. A variety of characterization techniques, such as white light interferometry, laser Doppler vibrometry (LDV), and double-beam laser interferometry (DBLI) have been used to determine the displacement of piezoelectric membranes [9][10

• × 2.8) and (1.4 × 1.2) mm2 labeled as A, B, C, and D, respectively. In the process of fabrication, a 100 nm thick layer of LNO as the bottom electrode was first deposited, using pulsed laser deposition (PLD) technique, on a single crystal silicon wafer. Then, an 850 nm lead barium zirconia titanate

• the piezo/photodiode device. The device was illuminated from the top surface using a laser diode at a wavelength of 628 nm. The light source was installed inside the AFM chamber, and the light beam was aligned towards the active area of the device. The illumination source was modulated by a square

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

• ; N = 3. Different uptake of untagged E. coli (39.8 ± 11.4%) vs HbMP (30′: 51.9 ± 6.0%; 120′: 47.1 ± 5.1%) by monocytes; N = 3. Phagocytosis of PMMA-FluoroGreen-COOH-MP diameter between 0.4 and 2.1 µm by monocytes and granulocytes. N = 3. The confocal laser scanning microscopy image showing the uptake

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

• development of many technologies in the future, such as solar cells [1][2], light-emitting diodes (LEDs) [3][4], laser diodes [5], and optical fibers [6]. Optoelectronics devices contribute to meeting requirements in telecommunications, medical equipment, sensors, and military services. Among those