Thin Au films (~5 nm) are known to form island-like structures with small gaps between the islands, which produce intense electric field "hot spots" under visible illumination. In this work, we perform finite difference time domain (FDTD) simulations based on experimentally observed high resolution transmission electron microscope (HRTEM) images of these films in order to study the nature of th...

Metal nitrides have been proposed to replace noble metals in plasmonics for some specific applications. In particular, while titanium nitride (TiN) and zirconium nitride (ZrN) possess localized plasmon resonances very similar to gold in magnitude and wavelength, they benefit from a much higher sustainability to temperature. For this reason, they are foreseen as ideal candidates for applications...

We investigate the creation of optical second-order sideband (OSS) from a hybrid system consisting single quantum dot (QD), spherical metallic nanoparticle, and low-Q microcavity driven with weak probe strong control field. Beyond conventional linearized description, we solve nonlinear Heisenberg–Langevin equations for achieving coefficient OSS by employing perturbation technique. It is shown t...

Construction of spherical liposomes is critical for developing tools for targeted gene and drug delivery applications in biotechnology and medicine, however, it has been demonstrated only in solution phase until now. Spherical liposome tethering on pristine thiol monolayer on gold transducer and its application to label free DNA sensing and transfection has rarely been reported. Here, we report...

We have developed a colloidal assembly for the study of plasmon–plasmon interactions between gold nanoparticles. Colloidal aggregates of controlled size and interparticle spacing were synthesized on silica nanoparticle substrates. Following the immobilization of isolated gold nanoparticles onto silica nanoparticles, the surfaces of the adsorbed gold nanoparticles were functionalized with 4-amin...

in this work, ag-cu nanoparticles (with different percentages of copper, 10%, 25%, 50%, 75% cu) were synthesized by wet chemical method. copper(ii) sulfate and silver nitrate were taken as metal precursors, ascorbic acid as reducing agent and anhydride maleic (ma) as a modifier. the prepared nanoparticles were characterized by means of x-ray diffraction (xrd) technique and scanning electron mic...

introduction: any decrease in friction between orthodontic wire and bracket can accelerate tooth movement in the sliding technique and result in better control of anchorage. the present study was carried out to decrease this friction by coating of zinc oxide nanoparticles (zno) on orthodontic wires and porcelain brackets. materials and methods: in this in vitro study, a combination of 120 0.019...

Abstract Upscaling of nanoparticle fabrication by sputtering into an ionic liquid is shown for the example Cu. Long-time (24 h) a large amount (50 mL) 1-butyl-3-methylimidazolium bis-(trifluoromethylsulfonyl)imide [Bmim][(Tf) 2 N] yields approximately 1 g Cu nanoparticles (mean spherical diameter (2.6 ± 1.1) nm), stabilized in without agglomerations. Extraction from stabilizing was performed wi...

PD-L1 aptamer-based spherical nucleic acids (SNAs) were designed that consist of oxaliplatin (OXA) encapsulated in a metal–organic framework (MOF) nanoparticle core and dense shell aptamer (denoted as M@O-A), reported by Zhengyu Jin, Jie Tian, Yang Du, co-workers their Research Article (e202214750). Upon light irradiation, the versatile M@O-A allows for robust photo-immunotherapy against cancer...