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

• infected with L. major was also significantly reduced compared to the negative control. Hence, it is noteworthy that both MNPs had an impact on cutaneous leishmaniasis infections. However, there was no influence of metal (Ag or Au) particles on the leishmanicidal activity of the systems. In these studies

Nanoarchitectonics of photothermal materials to enhance the sensitivity of lateral flow assays

• Elangovan Sarathkumar,
• Rajasekharan S. Anjana and
• Ramapurath S. Jayasree

Beilstein J. Nanotechnol. 2023, 14, 988–1003, doi:10.3762/bjnano.14.82

• LSPR effect highly depends on size, shape, composition, interparticle distance, dielectric constant, and surrounding medium of the particles [36][37]. While Pt, Ag, and Au particles all exhibit photothermal properties, Au nanoparticles are commonly used for photothermal applications. By changing the

Sputtering onto liquids: a critical review

• Anastasiya Sergievskaya,
• Adrien Chauvin and
• Stephanos Konstantinidis

Beilstein J. Nanotechnol. 2022, 13, 10–53, doi:10.3762/bjnano.13.2

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

• using computer simulation methods of only one of the physical methods used for the production of binary Cu–Au nanoparticles (i.e, the synthesis from a high-temperature gas phase). For the first time, a detailed study of the dependence of the atomic ordering of Cu–Au particles on the concentration of

• 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

• our MD simulation, the arrangement of atoms in many Cu–Au nanoparticles precisely corresponded to a five-fold symmetry (Figure 4). Thus, we can conclude that the physical methods used for the synthesis of binary Cu–Au particles contribute to the formation of icosahedral clusters in contrast to the

Walking energy harvesting and self-powered tracking system based on triboelectric nanogenerators

• Mingliang Yao,
• Guangzhong Xie,
• Qichen Gong and
• Yuanjie Su

Beilstein J. Nanotechnol. 2020, 11, 1590–1595, doi:10.3762/bjnano.11.141

• and deionized water were used to clean 50 μm thick PTFE films, which were then dried with nitrogen. During the etching process, DC sputtering was used on the surface of the PTFE film as a mask to deposit Au particles for 45 s. Next, a gas mixture containing O2, CF4, and Ar was introduced to the

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

• wafer with Au particles after the silicon etching process. During this process, the H2O2 concentration in the etching solution was 145 mmol/L. One result of the increased H2O2 concentration is the larger etching depth of approx. 1.8 μm. Again, the etching resulted in vertical silicon walls/wires and the

• Au particles. However, these results demonstrate the feasibility of an iridium catalyst for the MACE process. Figure 9c,d shows the etching result of the dies with the partly agglomerated Ir particles. Here, the porous Ir film remains on top of the surface. This can be seen in Figure 9d where parts

• %. The average value over the measured range is 5.4%. For comparison, the measurement of the Si wafer with the Au particles is added to the graph. This wafer has been etched under the same etching conditions but shows a significantly better performance than the other wafers. The reported reflectance

The effect of heat treatment on the morphology and mobility of Au nanoparticles

• Sven Oras,
• Sergei Vlassov,
• Simon Vigonski,
• Boris Polyakov,
• Mikk Antsov,
• Vahur Zadin,
• Rünno Lõhmus and
• Karine Mougin

Beilstein J. Nanotechnol. 2020, 11, 61–67, doi:10.3762/bjnano.11.6

• were heated to 100 °C to remove excess water. An image was first taken in the high-resolution QNM mode to find the Au particles. Then, the operation mode was switched to tapping mode. The oscillation amplitude was kept constant with a feedback loop on, and the power dissipated during tapping was

Kelvin probe force microscopy of the nanoscale electrical surface potential barrier of metal/semiconductor interfaces in ambient atmosphere

• Petr Knotek,
• Tomáš Plecháček,
• Jan Smolík,
• Petr Kutálek,
• Filip Dvořák,
• Milan Vlček,
• Jiří Navrátil and
• Čestmír Drašar

Beilstein J. Nanotechnol. 2019, 10, 1401–1411, doi:10.3762/bjnano.10.138

• topmost layer. The Au particles were dc-sputtered onto the Bi2Se3 substrate and the surface was immediately measured by means of AFM. The particles exhibited a height ranging from 5 to 70 nm. The height distribution (with the maximal population at ca. 40 nm) and the FWHM did not change within 72 h after

• interactions of the tip coating with the samples. The measured difference of the surface contact potential (Figure 1C) between Au particles and Bi2Se3 was not identical for all particles depended on the height of the particles. The height, i.e., the vertical distance between the top of the NP and the substrate

• and the contrast of the surface contact potential of Au particles (Figure 2A, B) were measured within the same line profile. Au NPs of greater height showed lower values of the surface contact potential according to the non-linear curve limited to a Δ surface contact potential between −50 and −60 mV

Deposition of metal particles onto semiconductor nanorods using an ionic liquid

• Michael D. Ballentine,
• Elizabeth G. Embry,
• Marco A. Garcia and
• Lawrence J. Hill

Beilstein J. Nanotechnol. 2019, 10, 718–724, doi:10.3762/bjnano.10.71

• product was then extracted into toluene and a TEM sample was prepared without further purification (Figure 3a). We observed that Au particles with diameters of 2 ± 1 nm formed preferentially on the termini of semiconductor nanorods, and the morphologies of these gold-decorated nanorods were similar to

Sputtering of silicon nanopowders by an argon cluster ion beam

• Xiaomei Zeng,
• Vasiliy Pelenovich,
• Zhenguo Wang,
• Wenbin Zuo,
• Sergey Belykh,
• Alexander Tolstogouzov,
• Dejun Fu and
• Xiangheng Xiao

Beilstein J. Nanotechnol. 2019, 10, 135–143, doi:10.3762/bjnano.10.13

• yield was maximium when the radius of the particle was close to the energy deposition depth. The sputtering yield of Au particles bombarded by 200 keV Xe atoms in the collision-spike sputtering regime has been also found to be more than three times higher in comparison with that of the bulk Au target

Electrospun one-dimensional nanostructures: a new horizon for gas sensing materials

• Muhammad Imran,
• Nunzio Motta and
• Mahnaz Shafiei

Beilstein J. Nanotechnol. 2018, 9, 2128–2170, doi:10.3762/bjnano.9.202

• ) with response and recovery times of 8 s and 5 s for 100 ppm of acetone [146]. SnO2 NTs have also been functionalized by bio-inspired Pt particles (2 nm diameter) at 0.16 wt % and Au particles (2.7 nm diameter) at 0.08 wt % using a protein nanocage by single-nozzle electrospinning [183] as shown

Cr(VI) remediation from aqueous environment through modified-TiO₂-mediated photocatalytic reduction

• Rashmi Acharya,
• Brundabana Naik and
• Kulamani Parida

Beilstein J. Nanotechnol. 2018, 9, 1448–1470, doi:10.3762/bjnano.9.137

Tuning adhesion forces between functionalized gold colloidal nanoparticles and silicon AFM tips: role of ligands and capillary forces

• Sven Oras,
• Sergei Vlassov,
• Marta Berholts,
• Rünno Lõhmus and
• Karine Mougin

Beilstein J. Nanotechnol. 2018, 9, 660–670, doi:10.3762/bjnano.9.61

• between Au particles and silicon substrates. Furthermore, Langbein et al. stated that the vdW attraction between two surfaces is only affected by their outer layers, if the separation of the surfaces is lower or in the same range as the thickness of the outer layer [22]. As a result, functionalization of

• of the present study. VdW calculation To validate our results, vdW force between the functionalized Au particles and AFM tip were calculated. The simulation of these dipole-induced forces involves a large number of molecular structure-specific variables. Therefore, only thiol as an example tail group

Bombyx mori silk/titania/gold hybrid materials for photocatalytic water splitting: combining renewable raw materials with clean fuels

• Stefanie Krüger,
• Michael Schwarze,
• Otto Baumann,
• Christina Günter,
• Michael Bruns,
• Christian Kübel,
• Dorothée Vinga Szabó,
• Rafael Meinusch,
• Verónica de Zea Bermudez and
• Andreas Taubert

Beilstein J. Nanotechnol. 2018, 9, 187–204, doi:10.3762/bjnano.9.21

• for water splitting than polychromatic light with wavelengths (λ) > 400 nm. Furthermore they also concluded that small Au particle sizes of around 2 nm and a low calcination temperature of 200 °C also yields materials producing more H2 than materials with larger Au particles or materials pre-treated

• with optical microscopy. Moreover, the diameter of the AuNPs in the TS_Au5.0 materials is mainly between 7–13 nm, but smaller Au particles are also present. Furthermore, bright field TEM images of TS_Au5.0 show a homogeneous AuNP distribution on the TNP. Dark field STEM images of the HM show a better

Evaluation of preparation methods for suspended nano-objects on substrates for dimensional measurements by atomic force microscopy

• Petra Fiala,
• Daniel Göhler,
• Benno Wessely,
• Michael Stintz,
• Giovanni Mattia Lazzerini and
• Andrew Yacoot

Beilstein J. Nanotechnol. 2017, 8, 1774–1785, doi:10.3762/bjnano.8.179

• -specific numbers of deposited particles (for quadratic packing) in dependence of the nominal particle diameter x and different KC-values. SEM images of a) spherical Au particles (60 nm) and b) Au rods (25 × 77 nm) prepared on track etching membranes by membrane filtration. SEM images of a) spherical Au

• particles (60 nm) and b) Au rods (25 × 77 nm) prepared on Si wafers by conventional drop-drying. SEM images of a) spherical Ag particles (50 nm) and b) fractal TiO2 particles (<150 nm) prepared on Si wavers by conventional drop-drying. SEM overview image of spherical SiO2 particles (100 nm) prepared on Si

Near-infrared-responsive, superparamagnetic Au@Co nanochains

• Varadee Vittur,
• Arati G. Kolhatkar,
• Shreya Shah,
• Irene Rusakova,
• Dmitri Litvinov and
• T. Randall Lee

Beilstein J. Nanotechnol. 2017, 8, 1680–1687, doi:10.3762/bjnano.8.168

• this replacement reaction, it is likely that nucleation of the reduced Au atoms led to small Au particles that eventually grew into a thin Au shell covering the cobalt nanoparticles. At the same time, because of its extended polymeric chain structure, PVP, which was present as a colloidal stabilizer

Assembly of metallic nanoparticle arrays on glass via nanoimprinting and thin-film dewetting

• Sun-Kyu Lee,
• Sori Hwang,
• Yoon-Kee Kim and
• Yong-Jun Oh

Beilstein J. Nanotechnol. 2017, 8, 1049–1055, doi:10.3762/bjnano.8.106

• imprinted silica, the Ag and Au films were successfully dewetted into the pits and formed uniform nanoparticles with only small residuals on top of the silica surface. The dewetted Au particles directly formed on the Si master molds by annealing at 500 °C; their appearance and size distributions are shown

• in Figure 8 and Figure 7e together with data for the Au particles formed on the imprinted sol–gel silica in Figure 7d. Comparing the plots shown in Figure 7e and Figure 7d, thin-film dewetting using the imprinted silica (Figure 7d) resulted in only a slight loss of size uniformity and periodicity

• to a previous report [11], the (100) orientation of Au particles on a Si template with inverted pyramidal pits predominates when the cubic (111) crystal planes, which have the lowest surface energy, become parallel to the facets of the pits. Therefore, we assume that the imprinted facets of the pits

Influence of hydrofluoric acid treatment on electroless deposition of Au clusters

• Rachela G. Milazzo,
• Antonio M. Mio,
• Giuseppe D’Arrigo,
• Emanuele Smecca,
• Alessandra Alberti,
• Gabriele Fisichella,
• Filippo Giannazzo,
• Corrado Spinella and
• Emanuele Rimini

Beilstein J. Nanotechnol. 2017, 8, 183–189, doi:10.3762/bjnano.8.19

• the original and structural characteristics of the Au particles [25]. Therefore, we prepared the samples for TEM analysis using two different thinning procedures. One sample was obtained after a conventional TEM preparation technique, including mechanical and high energy ion thinning (Ar+ ions at 5

• orientation, as found by SAED, by comparing the “heteroepitaxial ratio”, defined as: where A is the area under the corresponding peak. Rh.e. is a parameter related to the degree of texturing exhibited by the Au particles as a function of the HF treatment. The ratio amounts to 1.17 after 40 s and to 1.75 after

Scanning reflection ion microscopy in a helium ion microscope

• Yuri V. Petrov and
• Oleg F. Vyvenko

Beilstein J. Nanotechnol. 2015, 6, 1125–1137, doi:10.3762/bjnano.6.114

• . Additionally, the ratio of the signals from the top and side surface of the Au particles in the BSI and RI images are inverted. The top surface of the particles is brighter than the side wall in the RI image, whereas in BSI image, the situation is reversed. Figure 3a,b represents a comparison of the SE and RI

• to be 2.5 nm. These values gave the angle of the beam divergence of approximately 0.5 mrad, which is in a good agreement with the manufacturer’s data. Figure 2 represents the images of a Au on carbon sample that is partially covered by Au nanoparticles in the central part only. As expected, the Au

• particles exhibit a bright contrast in the BSI image on the dark background of the carbon substrate due to its significantly larger atomic number. On the contrary, the RI image does not show any noticeable signal difference between two different materials, giving information about surface morphology only

Patterning technique for gold nanoparticles on substrates using a focused electron beam

• Takahiro Noriki,
• Shogo Abe,
• Kotaro Kajikawa and
• Masayuki Shimojo

Beilstein J. Nanotechnol. 2015, 6, 1010–1015, doi:10.3762/bjnano.6.104

• two-dimensional close packing of Au particles was partially obtained; however, particles were missing in some areas. Figure 3 shows a SEM image of the sample after step (iii) where a line of gold nanoparticles remains on the substrate. Since the observation process using SEM immobilizes the

Properties of plasmonic arrays produced by pulsed-laser nanostructuring of thin Au films

• Katarzyna Grochowska,
• Katarzyna Siuzdak,
• Peter A. Atanasov,
• Carla Bittencourt,
• Anna Dikovska,
• Nikolay N. Nedyalkov and
• Gerard Śliwiński

Beilstein J. Nanotechnol. 2014, 5, 2102–2112, doi:10.3762/bjnano.5.219

• resulted in nano-arrays of Au particles characterized by self-organization despite the granular structure revealed by the continuous ITO layer (see Figure 1c, inset on the left). As concluded from the previous section, these NP arrays revealed the SPR-related enhancement of the optical signal. Testing of

Manipulation of nanoparticles of different shapes inside a scanning electron microscope

• Boris Polyakov,
• Sergei Vlassov,
• Leonid M. Dorogin,
• Jelena Butikova,
• Mikk Antsov,
• Sven Oras,
• Rünno Lõhmus and
• Ilmar Kink

Beilstein J. Nanotechnol. 2014, 5, 133–140, doi:10.3762/bjnano.5.13

• (circles). The theoretical curves of friction as functions of the radius of the NPs according to the DMT-M model (dashed curve) and frozen droplet model (solid curve). Calculated contact areas and static friction forces for 150 nm Au particles of different faceting. Supporting Information The Supporting

Cyclic photochemical re-growth of gold nanoparticles: Overcoming the mask-erosion limit during reactive ion etching on the nanoscale

• Burcin Özdemir,
• Axel Seidenstücker,
• Alfred Plettl and
• Paul Ziemann

Beilstein J. Nanotechnol. 2013, 4, 886–894, doi:10.3762/bjnano.4.100

• position of the seeded Au NP. An electroless Au deposition onto already existing Au seeds, which is based on combining a gold salt (HAuCl4) and a reducing agent (NH2OH), has been reported [13][14]. Recently, a direct photochemical re-growth of Au particles without any reducing agents was developed [15][16

• Figure 4. (a) Pillar pattern fabricated on the SiO2 substrates by a short RIE step [pillar height (h) = 25 nm, initial NP diameter = 12 nm, final NP diameter = 9 nm (average values)]. (b) Photochemically grown Au particles on the seeds of panel (a) [final NP diameter = 24 nm (average)]. (c) Seeded Au NP

Tuning the properties of magnetic thin films by interaction with periodic nanostructures

• Ulf Wiedwald,
• Felix Haering,
• Stefan Nau,
• Carsten Schulze,
• Herbert Schletter,
• Denys Makarov,
• Alfred Plettl,
• Karsten Kuepper,
• Manfred Albrecht,
• Johannes Boneberg and
• Paul Ziemann

Beilstein J. Nanotechnol. 2012, 3, 831–842, doi:10.3762/bjnano.3.93

• monolayers of self-assembled Au particles on thermally oxidized Si(100) substrates [28]. The Au colloid solution was diluted with pure ethanol in the volume ratio of 2:1. A volume of 60 µL of such solution was dispersed onto the substrates and dried under ambient conditions in a covered box to prevent air

• with sizes of about 10 to 20 nm are formed in between Au particles. On the one hand, this approach allows significant reduction of the average distance of nanostructures as compared to the PS colloids; on the other hand the homogeneity of coverage is strongly reduced. The impact of these differences on

• the nearly densely-packed Au particles, one can understand this finding qualitatively: the rims around the particles act as sites for preferential domain-wall nucleation, while the pinning effect rather occurs in between particles, acting as defects here. The interplay of both effects may lead to the

Plasmonics-based detection of H₂ and CO: discrimination between reducing gases facilitated by material control

• Gnanaprakash Dharmalingam,
• Nicholas A. Joy,
• Benjamin Grisafe and
• Michael A. Carpenter

Beilstein J. Nanotechnol. 2012, 3, 712–721, doi:10.3762/bjnano.3.81

• H2 adsorption, coupled with the smaller-diameter Au particles. Although the thinner Au sample has the same thickness of YSZ and hence essentially the same number of oxygen vacancies as the small-particle sample, the smaller Au particles in the latter case lead to an increased response. This may be

• explained as follows. The adsorption of CO leads to the extraction of oxygen ions from the lattice, followed by injection of electrons from the O2− ions into the matrix and CO2 desorption. This can increase the free-electron density of the Au particles and cause the shift of the plasmon peak to the lower

• nanocomposite results in a vivid change in the response to H2 and CO gases, and also an apparent desensitization to NO2. The morphological switching mentioned here results from a change in the sample fabrication method from a co-sputtered Au–YSZ film, in which the Au particles are embedded in the YSZ matrix, to