Fate and transformation of silver nanoparticles in different biological conditions

• Barbara Pem,
• Marija Ćurlin,
• Darija Domazet Jurašin,
• Valerije Vrček,
• Rinea Barbir,
• Vedran Micek,
• Raluca M. Fratila,
• Jesus M. de la Fuente and
• Ivana Vinković Vrček

Beilstein J. Nanotechnol. 2021, 12, 665–679, doi:10.3762/bjnano.12.53

• was studied in the presence of the most relevant biothiols: cysteine (CYS) and glutathione (GSH). Data on the size distribution of different AgNPs in the tested media are given in Figure 5 and in Supporting Information File 1, Table S1, while observed ζ potentials are presented in Figure 6 and in

• , Perkin Elmer, Shelton, USA). The silver standard solution (1000 mg/L in 5% HNO3) from Merck (Darmstadt, Germany) was used for calibration. All prepared AgNPs were characterized by means of shape, primary size, size distribution, and surface charge in UPW. The particle visualization was performed by TEM

• ) equipped with a green laser (532 nm) at an angle of 173°. The values of dH were obtained as the value of the maximum peak of the size distribution by volume and reported as an average of ten measurements. The ζ potential values were determined by ELS using the same Zetasizer Nano ZS instrument. The values

Stability and activity of platinum nanoparticles in the oxygen electroreduction reaction: is size or uniformity of primary importance?

• Kirill O. Paperzh,
• Anastasia A. Alekseenko,
• Vadim A. Volochaev,
• Ilya V. Pankov,
• Olga A. Safronenko and
• Vladimir E. Guterman

Beilstein J. Nanotechnol. 2021, 12, 593–606, doi:10.3762/bjnano.12.49

• . Keywords: durability; electrocatalysts; morphology control; oxygen reduction reaction; platinum nanoparticles; size distribution; spatial distribution; Introduction Nowadays, low-temperature proton-exchange membrane fuel cells (PEMFC) are gaining a wider application. This is due to their environmental

• min. A drop of the resulting suspension was applied to a standard copper mesh with a diameter of 3.05 mm, covered with a 5–6 nm thick layer of amorphous carbon. Next, the sample was dried in air at room temperature for 60 min. The histograms of platinum nanoparticle size distribution in the catalysts

• micrographs. The composition of the commercial catalysts JM20 and JM40 is similar to that of G20 and G40: the average crystallite size is 2.5 and 3.7 nm, and the average NP size is 2.7 and 3.7 nm, respectively. The comparison of the NP size distribution histograms indicates that in the synthesized Pt/C

On the stability of microwave-fabricated SERS substrates – chemical and morphological considerations

• Limin Wang,
• Aisha Adebola Womiloju,
• Christiane Höppener,
• Ulrich S. Schubert and
• Stephanie Hoeppener

Beilstein J. Nanotechnol. 2021, 12, 541–551, doi:10.3762/bjnano.12.44

• capabilities of the SERS substrates due to size and nanolensing effects [26][27]. However, this complicates the quantitative analysis of the nanoparticle sizes. In this study, we analyzed the averaged particle size distribution by evaluating the projected area of the particles to determine the particle

Surface-enhanced Raman scattering of water in aqueous dispersions of silver nanoparticles

• Paulina Filipczak,
• Krzysztof Hałagan,
• Jacek Ulański and
• Marcin Kozanecki

Beilstein J. Nanotechnol. 2021, 12, 497–506, doi:10.3762/bjnano.12.40

• in the Supporting Information section of [35]). The calculated EF is equal to (4.8 ± 0.8) × 106, taking into account the size distribution of the nanoparticles in the AgNPs blue sample. This result assumes that all water molecules located on the Ag surface participate in the resonance effect. Of

• account the size distribution of nanoparticles in the AgNPs blue sample. The temperature analysis showed that the observed enhancement increases with the increase of the temperature. The calculated activation energy for a AgNPs sample is larger than that for pure water, which is an effect of water

Boosting of photocatalytic hydrogen evolution via chlorine doping of polymeric carbon nitride

• Malgorzata Aleksandrzak,
• Michalina Kijaczko,
• Wojciech Kukulka,
• Daria Baranowska,
• Martyna Baca,
• Beata Zielinska and
• Ewa Mijowska

Beilstein J. Nanotechnol. 2021, 12, 473–484, doi:10.3762/bjnano.12.38

• samples, which is typical of mesoporous materials (Figure 6). The hysteresis loops, pore–size distribution curves, and average pore diameter for both samples are similar. The proportion of micropores is small and the samples contain mainly mesopores. The sample modified by chlorine presents a slightly

Rapid controlled synthesis of gold–platinum nanorods with excellent photothermal properties under 808 nm excitation

• Jialin Wang,
• Qianqian Duan,
• Min Yang,
• Boye Zhang,
• Li Guo,
• Pengcui Li,
• Wendong Zhang and
• Shengbo Sang

Beilstein J. Nanotechnol. 2021, 12, 462–472, doi:10.3762/bjnano.12.37

• integrity after four laser irradiations, showing almost no change in morphology and size distribution. Conclusion We report a simple method for preparing dumbbell-like Au@Pt NRs under mild conditions. By controlling the concentration of Ag+ and K2PtCl4 in the reaction solution, Au@Pt NRs were synthesized

A review on nanostructured silver as a basic ingredient in medicine: physicochemical parameters and characterization

• Gabriel M. Misirli,
• Kishore Sridharan and
• Shirley M. P. Abrantes

Beilstein J. Nanotechnol. 2021, 12, 440–461, doi:10.3762/bjnano.12.36

• solutions (i.e., the polydispersion index, PDI) which is basically a representation of the size distribution of the population in a given sample. The numerical value of the PDI ranges from 0 (for a perfectly uniform sample in terms of particle sizes) to 1.0 (for a highly polydispersed sample with a

• complementary way, the size, distribution, shape heterogeneity, morphology, dispersion, and aggregation can be directly evaluated via TEM in which the high spatial resolution facilitates the investigation of the electronic structure and chemical composition [156]. However, the disadvantages other than the

Solution combustion synthesis of a nanometer-scale Co₃O₄ anode material for Li-ion batteries

• Monika Michalska,
• Huajun Xu,
• Qingmin Shan,
• Shiqiang Zhang,
• Yohan Dall'Agnese,
• Yu Gao,
• Amrita Jain and
• Marcin Krajewski

Beilstein J. Nanotechnol. 2021, 12, 424–431, doi:10.3762/bjnano.12.34

• been established that the electrochemical performance of Co3O4 materials is improved when they possess either small size or appropriate pore size distribution and morphologies, such as porous or hierarchical structures, or the combination of both these features [3][4]. So far, different syntheses have

• powder magnified (a) 25,000 times and (b) 100,000 times. (c) TEM image of the Co3O4 powder (inset: a particle size distribution diagram). Electrochemical properties of the Co3O4 electrodes. (a) The first to fifth cycle profiles measured at current density of 100 mA·g−1. (b) Cycling performance measured

Spontaneous shape transition of Mn_xGe_1−x islands to long nanowires

• S. Javad Rezvani,
• Luc Favre,
• Gabriele Giuli,
• Yiming Wubulikasimu,
• Isabelle Berbezier,
• Augusto Marcelli,
• Luca Boarino and
• Nicola Pinto

Beilstein J. Nanotechnol. 2021, 12, 366–374, doi:10.3762/bjnano.12.30

• using these techniques, NWs are grown away from the substrate, usually in a tilted direction, and size distribution and geometry strongly depend on the growth dynamics [32][33]. Furthermore, it is known that the catalyst introduces uncontrolled and unwanted contamination inside the crystal lattice of

• Ge on Si substrates, or the endotaxial growth of transitional metal silicides (e.g., CoSi2) [34][36]. In these studies, the NWs exhibit a narrow diameter distribution, in contrast to those obtained by VLS, which commonly have wider range due to the droplet size distribution. In the present work, we

• (NPs). Further increase of the Mn layer thickness to 9 ML results in a closely packed film of agglomerated islands with a relatively uniform size distribution (≃100 nm) completely filling the surface (see Figure 1c). XRD in Bragg–Brentano geometry has been carried out on these islands on the annealed 9

Nickel nanoparticle-decorated reduced graphene oxide/WO₃ nanocomposite – a promising candidate for gas sensing

• Ilka Simon,
• Alexandr Savitsky,
• Rolf Mülhaupt,
• Vladimir Pankov and
• Christoph Janiak

Beilstein J. Nanotechnol. 2021, 12, 343–353, doi:10.3762/bjnano.12.28

• . TEM samples were prepared by drop casting the with acetonitrile diluted material on 200 µm carbon-coated copper grids, followed by washing the grid several times with acetonitrile to remove the excess ionic liquid. The size distribution was determined manually or with the aid of the Gatan Digital

Characterization, bio-uptake and toxicity of polymer-coated silver nanoparticles and their interaction with human peripheral blood mononuclear cells

• Sahar Pourhoseini,
• Reilly T. Enos,
• Angela E. Murphy,
• Bo Cai and
• Jamie R. Lead

Beilstein J. Nanotechnol. 2021, 12, 282–294, doi:10.3762/bjnano.12.23

• 9.4). STEM images of 1000 µg·L−1 PVP-AgNPs and particle size distribution obtained from ImageJ. PVP-AgNPs in RPMI medium (without cells) at (a, b) t = 0, size distribution = 29 ± 0.49 nm and at (c, d) t = 24 h, size distribution = 17 ± 11 nm, under the same conditions as during exposure to cells

Differences in surface chemistry of iron oxide nanoparticles result in different routes of internalization

• Barbora Svitkova,
• Vlasta Zavisova,
• Veronika Nemethova,
• Martina Koneracka,
• Miroslava Kretova,
• Filip Razga,
• Monika Ursinyova and
• Alena Gabelova

Beilstein J. Nanotechnol. 2021, 12, 270–281, doi:10.3762/bjnano.12.22

• characteristics of these nanoparticles in the solvent and culture medium are shown in Table 1. Dynamic light scattering (DLS) Particle size distribution and zeta potential of the surface-modified MNPs in stock solution and culture medium were determined by DLS using a Zetasizer Nano-ZS (Malvern Instruments, UK

A review on the green and sustainable synthesis of silver nanoparticles and one-dimensional silver nanostructures

• Sina Kaabipour and
• Shohreh Hemmati

Beilstein J. Nanotechnol. 2021, 12, 102–136, doi:10.3762/bjnano.12.9

• but not limited to renewable energy, electronics, biosensors, wastewater treatment, medicine, and clinical equipment. The properties of silver nanostructures, such as size, size distribution, and morphology, are strongly dependent on synthesis process conditions such as the process type, equipment

• ], lithography [120][121], spray pyrolysis [122][123][124], radiolysis [125][126][127][128], arc discharge [129][130][131][132][133], and photoirradiation [134][135][136] have been utilized to synthesize various morphologies of silver nanostructures with varied size and size distribution. The physical synthesis

• demonstrated great advances in the last decade, yet there are still issues regarding stability, size distribution, morphology, unknown biological functions [140], and the consideration that some biological processes cannot become industrially feasible due to strict and time-consuming aseptic procedures [185

The role of gold atom concentration in the formation of Cu–Au nanoparticles from the gas phase

• Yuri Ya. Gafner,
• Svetlana L. Gafner,
• Darya A. Ryzkova and
• Andrey V. Nomoev

Beilstein J. Nanotechnol. 2021, 12, 72–81, doi:10.3762/bjnano.12.6

• study was to determine the possible effect of the initial chemical composition of the gas phase, in the synthesis chamber, on the size distribution of the final particles and on the chemical composition of gold and copper atoms. To analyze the processes occurring during condensation, four different

• simulation and the data on the size distribution of Cu3Au clusters obtained by laser deposition [3]. An analysis of the shape and distribution of the Cu3Au clusters on the substrate indicates that the agglomeration processes were suppressed in this case [3]. The reason for that may be the wide spatial

• with the data from the performed MD simulation for the Cu90Au10 case. A size distribution very similar to that of the simulation results of Cu nanoparticles is seen for binary Cu–Au particles obtained from this chemical composition of the initial gas medium. The main group containing clusters with a

Bio-imaging with the helium-ion microscope: A review

• Matthias Schmidt,
• James M. Byrne and
• Ilari J. Maasilta

Beilstein J. Nanotechnol. 2021, 12, 1–23, doi:10.3762/bjnano.12.1

Free and partially encapsulated manganese ferrite nanoparticles in multiwall carbon nanotubes

• Saja Al-Khabouri,
• Salim Al-Harthi,
• Toru Maekawa,
• Mohamed E. Elzain,
• Ashraf Al-Hinai,
• Ahmed D. Al-Rawas,
• Abbsher M. Gismelseed,
• Ali A. Yousif and
• Myo Tay Zar Myint

Beilstein J. Nanotechnol. 2020, 11, 1891–1904, doi:10.3762/bjnano.11.170

• nanoparticles have sizes ranging from 5 to 24 nm, with an estimated average size of 10–19 nm (Figure 1b). The particle size distribution is shown in Supporting Information File 1, Figure S2. In addition, a HRTEM image (Figure 1c) indicates a lattice spacing of 0.26 nm for the (311) plane of the MnFe2O4

• , the hyperfine fields at the tetrahedral and octahedral sites are lower than those of the bulk [21]. The large value used for the line width is due to the large size distribution and/or to surface effects. Although free and partially encapsulated manganese ferrite nanoparticles are prepared using two

Unravelling the interfacial interaction in mesoporous SiO₂@nickel phyllosilicate/TiO₂ core–shell nanostructures for photocatalytic activity

• Bridget K. Mutuma,
• Xiluva Mathebula,
• Isaac Nongwe,
• Bonakele P. Mtolo,
• Boitumelo J. Matsoso,
• Rudolph Erasmus,
• Zikhona Tetana and
• Neil J. Coville

Beilstein J. Nanotechnol. 2020, 11, 1834–1846, doi:10.3762/bjnano.11.165

• agglomerated pores [49]. TiO2, on the other hand, displayed a type-II isotherm characteristic of a nonporous material (Supporting Information File 1, Figure S2b). The pore size distribution in the SiO2 was narrow (2–5 nm) and in the mesoporous range with an average pore size of 3.2 nm (Figure 2b). After

• /ammonia) [45][46][49]. In addition, the pore size distribution of the mSiO2@NiPS core–shell nanocomposite was broader (2–15 nm) than that of mSiO2 (Figure 2b). During the formation of the mSiO2@NiPS/TiO2 composite, the pore diameter slightly increased to 7.7 nm, indicating the presence of interparticle

• surface area was determined by the BET method from N2 adsorption data and the pore size distribution was determined by the Barret–Joyner–Halenda (BJH) method. The diffuse reflectance (DR) UV–vis spectra were obtained in the range of 200–800 nm using a Cary 500 spectrophotometer equipped with a Praying

Nanocasting synthesis of BiFeO₃ nanoparticles with enhanced visible-light photocatalytic activity

• Thomas Cadenbach,
• Maria J. Benitez,
• A. Lucia Morales,
• Cesar Costa Vera,
• Luis Lascano,
• Francisco Quiroz,
• Alexis Debut and
• Karla Vizuete

Beilstein J. Nanotechnol. 2020, 11, 1822–1833, doi:10.3762/bjnano.11.164

• exclusively round particles with a particle diameter of 5.5 nm with a very narrow size distribution (standard deviation of ±1.0 nm on 258 analyzed particles, see histogram in Figure 5b). The monodisperse nature of the nanoparticles as well as their size of 5.5 nm confirms the successful wet impregnation of

• very narrow particle size distribution. The results also suggest that the nanoparticles are characterized by a low concentration of surface defects and a low level of local strain, which is ideal for surface-based applications such as photocatalysis. This is confirmed by the reaction kinetics of the

Self-standing heterostructured NiC_x-NiFe-NC/biochar as a highly efficient cathode for lithium–oxygen batteries

• Shengyu Jing,
• Xu Gong,
• Shan Ji,
• Linhui Jia,
• Bruno G. Pollet,
• Sheng Yan and
• Huagen Liang

Beilstein J. Nanotechnol. 2020, 11, 1809–1821, doi:10.3762/bjnano.11.163

•  2a shows that the Prussian blue analogues formed on the surface of PP have a well-defined cubic shape with an uniform particle size distribution. The particle size was approx. 80 nm. These cubic particles were made out of many small particles and many cavities were observed on the surface. SEM images

PEG/PEI-functionalized single-walled carbon nanotubes as delivery carriers for doxorubicin: synthesis, characterization, and in vitro evaluation

• Shuoye Yang,
• Zhenwei Wang,
• Yahong Ping,
• Yuying Miao,
• Yongmei Xiao,
• Lingbo Qu,
• Lu Zhang,
• Yuansen Hu and
• Jinshui Wang

Beilstein J. Nanotechnol. 2020, 11, 1728–1741, doi:10.3762/bjnano.11.155

• 3000HS). A volume-weighted Gaussian size distribution was fit to the autocorrelation functions to obtain the particle size and zeta potential values. The atomic fractions of C, O, and N in the different SWCNTs samples were determined by X-ray photoelectron spectroscopy (XPS, Thermo Fisher Scientific

• -COOH sample is distinctly smaller than that of the raw SWCNTs, and the sample treated with H2SO4/HNO3 mixed acid solution has the most even size distribution. The particle size of CNTs modified by PEG and PEI increases slightly. It should be noted that dynamic light scattering (DLS) is mainly suitable

Cardiomyocyte uptake mechanism of a hydroxyapatite nanoparticle mediated gene delivery system

• Hiroaki Komuro,
• Masahiro Yamazoe,
• Kosuke Nozaki,
• Akiko Nagai and
• Tetsuo Sasano

Beilstein J. Nanotechnol. 2020, 11, 1685–1692, doi:10.3762/bjnano.11.150

• of 75 kV. The particle size distribution of the HAp nanoparticles was measured via NTA (NanoSight NS10, Malvern). Cell culture HL-1 is a cell line derived from mouse atrial myocytes, which was originally isolated and characterized by Dr. Claycomb (University of Louisiana) [39]. HL-1 cells (murine

• significant (ANOVA4 on the Web, Hiroshima Jogakuin University). Characterization of the prepared HAp nanoparticles using the W/O emulsion method. (a) A representative TEM image of HAp nanoparticles. The nanoparticles exhibited uniform size and spherical-like morphology. Scale bar: 100 nm. (b) The size

• distribution of HAp nanoparticles was determined using nanoparticle tracking analysis (NTA). The mean diameter was 159 ± 47 nm. (c) An X-ray diffractogram of the HAp nanoparticles in the range of 2θ = 20–60°. The spectra revealed the characteristic peaks of HAp according to ICDD no. 09-0432 (vertical lines

High-responsivity hybrid α-Ag₂S/Si photodetector prepared by pulsed laser ablation in liquid

• Raid A. Ismail,
• Hanan A. Rawdhan and
• Duha S. Ahmed

Beilstein J. Nanotechnol. 2020, 11, 1596–1607, doi:10.3762/bjnano.11.142

• enabled them to be used in many promising applications, for example, catalysis and electronic and optoelectronic devices [1][2][3]. In this regard, controlling particle sizes and attaining them within a narrow size distribution are important. Silver sulfide is an important semiconducting material with a

• surfactant, monodispersed Ag2S nanoparticles can be obtained with an average size of 45 nm with few agglomerated NPs. Figure 9 shows the particle size distribution of Ag2S synthesized without and with CTAB. The particle size of Ag2S NPs ranged from 10 to 70 nm with an average of 55 nm, while the particle

• distribution of Ag2S NPs prepared with CTAB ranged from 5 to 60 nm with an average of 45 nm. The particle size distribution of Ag2S prepared with CTAB is nearly Gaussian. The particle size distribution improved after adding CTAB, which plays a major role in preventing particle agglomeration [38]. The energy

Electrokinetic characterization of synthetic protein nanoparticles

• Daniel F. Quevedo,
• Cody J. Lentz,
• Adriana Coll de Peña,
• Yazmin Hernandez,
• Nahal Habibi,
• Rikako Miki,
• Joerg Lahann and
• Blanca H. Lapizco-Encinas

Beilstein J. Nanotechnol. 2020, 11, 1556–1567, doi:10.3762/bjnano.11.138

• ) esters as the copolymer. The NHS esters react with the lysine groups of BSA and polymerize into insoluble SPNPs. The SPNPs had a spherical shape according to SEM images. We further analyzed the size distribution of the particles using the ImageJ software and found that the particles had an average

• diameter of 299 ± 128 nm (Figure 1b). The particles were subsequently collected and suspended in media. After allowing the particles to equilibrate for 24 h, the average particle diameter value increased to 356 ± 190 nm according to dynamic light scattering (DLS) measurements. The size distribution curves

• characterized (Table 1). SPNP-Lys-488s had a size distribution and ζp value similar to those of the BSA SPNPs when measured in the EK buffer (Figure S2, Supporting Information File 1). The small differences in size distribution were mainly due to stochastic variabilities during particle synthesis; however, all

Antimicrobial metal-based nanoparticles: a review on their synthesis, types and antimicrobial action

• Matías Guerrero Correa,
• Fernanda B. Martínez,
• Cristian Patiño Vidal,
• Camilo Streitt,
• Juan Escrig and
• Carol Lopez de Dicastillo

Beilstein J. Nanotechnol. 2020, 11, 1450–1469, doi:10.3762/bjnano.11.129

• regarding their surface area, size, distribution, and morphology [6][7][8]. Research evidence shows that antimicrobial properties clearly depend on the synthesis method used to obtain the NPs. These synthesis procedures can be classified into physical, chemical, and biological methods [9]. In general

• pressure at which the ball mills are subjected to in a grinder. By using this technique, Kim et al. have discussed how ZnO NPs can be developed with sizes ranging from 20 to 30 nm [26]. The microwave-thermal method [27][28][29][30] allows small particles to be obtained with a narrow size distribution from

Wafer-level integration of self-aligned high aspect ratio silicon 3D structures using the MACE method with Au, Pd, Pt, Cu, and Ir

• Mathias Franz,
• Romy Junghans,
• Paul Schmitt,
• Adriana Szeghalmi and
• Stefan E. Schulz

Beilstein J. Nanotechnol. 2020, 11, 1439–1449, doi:10.3762/bjnano.11.128

• broad particle size distribution. The surface is covered by more than 44%, which means 876 particles/μm2. The Pt particles mainly have a diameter below 10 nm with 495 particles/μm2. The total surface coverage did not exceed 1.0%. This result implies that the Pt film was significantly thinner than the

• , we were able to cover the whole wafer surface homogeneously with nanoparticles. The particle size distribution can easily be modified by varying film thickness and annealing conditions or, correspondingly, the number of ALD cycles for the Ir particles. Silicon etching The wafers with noble metal

• distributed walls with trenches of various sizes. This structure comprises nanopores of a few nanometres in diameter. The observed diameter distribution of the vertical trenches corresponds to the particle size distribution of Figure 1f. This indicates that all particles contribute to the etching process