Nanoarchitectonics with cetrimonium bromide on metal nanoparticles for linker-free detection of toxic metal ions and catalytic degradation of 4-nitrophenol

• Akash Kumar and
• Raja Gopal Rayavarapu

Beilstein J. Nanotechnol. 2024, 15, 1312–1332, doi:10.3762/bjnano.15.106

• , metal composition, centrifugation, and NaOH amount, were investigated for their impact on the performance of CTAB-capped nanoparticles in heavy metal detection and 4-NP degradation. CTAB-Au nanospheres demonstrated limited heavy metal ion detection capability but exhibited remarkable efficiency in

Plasmonic nanotechnology for photothermal applications – an evaluation

• A. R. Indhu,
• L. Keerthana and
• Gnanaprakash Dharmalingam

Beilstein J. Nanotechnol. 2023, 14, 380–419, doi:10.3762/bjnano.14.33

• equation captures well the redshift in the plasmon resonance for increasing particle diameters, not observable with the quasi-static approximation alone, as shown in Figure 6 for the case of Au nanospheres. Redshift and broadening of the plasmon resonance for the simple spherical morphology, allowing

Assessment of the optical and electrical properties of light-emitting diodes containing carbon-based nanostructures and plasmonic nanoparticles: a review

• Keshav Nagpal,
• Erwan Rauwel,
• Frédérique Ducroquet and
• Protima Rauwel

Beilstein J. Nanotechnol. 2021, 12, 1078–1092, doi:10.3762/bjnano.12.80

• device with Au nanospheres (EQE = 2.4 × 10−4). In addition to the shape of AuNP, their size also influences the performance of LED. To that end, AuNP of diameters 2 and 5 nm were combined with CNT and deposited onto a p-GaN-based anode in a multiquantum-well LED [45]. The EL spectra of these devices at

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

• , especially those with anisotropic structure, such as AuNRs, Au nanocages [5][6], Au nanostars [7][8], Au nanospheres [9][10], and Au nanoshells [11][12], show great potential as PTAs. Particularly, AuNRs, with a high inherent absorption–scattering ratio, simple and controllable synthesis, and high PCE [13

• as satisfactory. As shown in Figure 7b, each irradiation reduces the peak temperature of the next irradiation. After four cycles of irradiation, the maximum temperature decreased from 55.9 to 49.1 °C. Consistently with previously reported results, AuNRs melt into Au nanospheres under prolonged or

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

• accurate control of their intrinsic properties. For instance, Au nanospheres, nanocubes, nanorods and nanowires [10] have been routinely synthesized. Their physico-chemical and especially optical properties [11] of NPs strongly depend on their shape, size and spatial arrangement [12][13][14][15]. All these

Facile phase transfer of gold nanorods and nanospheres stabilized with block copolymers

• Yaroslav I. Derikov,
• Georgiy A. Shandryuk,
• Raisa V. Talroze,
• Alexander A. Ezhov and
• Yaroslav V. Kudryavtsev

Beilstein J. Nanotechnol. 2018, 9, 616–627, doi:10.3762/bjnano.9.58

• mass diblock copolymer of styrene and 2-vinylpyridine for ligand exchange at the nanoparticle surface. The method enables the preparation of stable sols of Au nanorods with sizes of up to tens of nanometers or Au nanospheres in various organic solvents. By comparing the optical absorbance spectra of Au

• organophilization before introducing them into a polymer matrix, except for when the host polymer is hydrophilic. The so-called phase transfer from polar to non-polar media can be carried out in a number of ways [17]. A typical procedure includes intensive mixing of a hydrosol of citrate-stabilized Au nanospheres

• band, which is the only one observable for Au nanospheres, only weakly depends on the nanoparticle size and geometry, while the latter band is considerably shifted toward the near-infrared region with increasing nanorod aspect ratio [41]. We simulated the interaction of light with spherical and rod

The nanofluidic confinement apparatus: studying confinement-dependent nanoparticle behavior and diffusion

• Stefan Fringes,
• Felix Holzner and
• Armin W. Knoll

Beilstein J. Nanotechnol. 2018, 9, 301–310, doi:10.3762/bjnano.9.30

• (termed height) and the lateral diffusion of 60 nm, charged, Au nanospheres as a function of confinement between a glass surface and a polymer surface. Interferometric scattering detection provides an effective particle illumination time of less than 30 μs, which results in lateral and vertical position

• the motion of the particles along high-gap-distance paths. Keywords: Au nanospheres; confinement; nanofluidics; subdiffusion; Introduction A fundamental understanding of the motion of micrometer- and nanometer-scaled objects in nanofluidic confinement is important for many biological and technical

• parallel confining surfaces for samples of choice and a cover glass to be adjusted and measured with nanometer accuracy. First, we describe and characterize the system, and then demonstrate its utility by measuring the behavior of 60 nm charged Au nanospheres in confinement between a glass and a polymer

Selective detection of Mg²⁺ ions via enhanced fluorescence emission using Au–DNA nanocomposites

• Tanushree Basu,
• Khyati Rana,
• Niranjan Das and
• Bonamali Pal

Beilstein J. Nanotechnol. 2017, 8, 762–771, doi:10.3762/bjnano.8.79

• spectrum, which corresponds to B-DNA. These observations were due to stacking interactions between the bases and the helical structure of DNA [26]. As shown in Figure 2a, upon addition of Au nanospheres (AuNS) to the DNA solution, the molar ellipticity decreased at approximately 220 nm and increased by

• . Surface plasmon absorption band of (a) Au nanospheres and (b) Au nanorods before and after DNA modification. Circular dichroism spectral changes in the DNA conformation upon binding with (a) Au nanospheres and (b) Au nanorods. TEM images of bare (a) AuNSs, (b) AuNRs, (c) AuNS–DNA and (d) AuNR–DNA

• (CH3COO)2) were purchased from Loba Chemie. Deionized water was obtained using an ultrafiltration system (Milli-Q, Millipore) with a measured conductivity above 35 S/cm at 25 °C. DNA from herring sperm (ratio of absorbance 260 to 280 nm is 1.8) was purchased from Merck Biosciences. Methods Synthesis of Au