Unified Methodology for Fabrication and Quantification of Gold Nanorods, Gold Core Silver Shell Nanocuboids, and Their Polymer Nanocomposites

Abstract

A multitude of applications is related to the unique properties of absorption, scattering, and plasmon-enhanced phenomena of metal nanoparticles (MNPs). The aqueous colloidal-based synthesis of MNPs is used more widely as it allows precise shape and size control. However, for various applications, it is required to have the MNPs in an organic solvent or polymer that is compatible with the MNPs. This work establishes a protocol from the synthesis to the phase transfer process of gold nanorods and gold core silver shell nanocuboids (Au@Ag NCs) in dichloromethane. Subsequent dispersion in a polymer (silicone encapsulant polymer) is achieved while retaining the MNPs’ plasmonic properties. Au@Ag NCs have not been transferred to an organic solvent to date due to their unique shape and instability in the organic phase. The established protocol is reproducible, and MNPs were found to be stable for up to a year in the polymer. Qualitative and quantitative validation of the experimental results is achieved on MNP concentration by a model based on the finite difference time domain method. Using the model, the concentration of MNPs in nanocomposite can be determined.

Albumin-Based Nanotheranostic Probe with Hypoxia Alleviating Potentiates Synchronous Multimodal Imaging and Phototherapy for Glioma

“…N AuNR can be calculated by C Au V sample /ρ Au V AuNR , where C Au is the concentration of Au in the total solution and determined by ICP-MS and ρ Au is the density of Au atoms (19.32 g/cm 3 ). V AuNR , the single AuNR volume, is calculated according to the determined length and diameter by TEM, and a cylindrical form of AuNR has been assumed from a finite-difference time-domain (FDTD) method-based model. , The concentration of ICG in the nanoprobes was measured at the absorbance of 780 nm by a UV spectrophotometer (Hitachi UH-5300, Japan). UV–vis–NIR spectra were recorded with a UV spectrophotometer.…”

“…V AuNR , the single AuNR volume, is calculated according to the determined length and diameter by TEM, and a cylindrical form of AuNR has been assumed from a finitedifference time-domain (FDTD) method-based model. 59,60 The concentration of ICG in the nanoprobes was measured at the absorbance of 780 nm by a UV spectrophotometer (Hitachi UH-5300, Japan). UV−vis−NIR spectra were recorded with a UV spectrophotometer.…”

Building Physics and Building Energy Systems

“…A typical LSC consists of a glass or plastic-based square/rectangular-shaped waveguide luminophores, which absorbs a short-wavelength photon and convert them into long-wavelength. Further, due to total internal reflection, these photons finally reach the PV cells attached at the edge of the waveguide [106][107][108][109][110], as shown in Figure 4. The advantage of LSC-BIPV system is that the PV cells are placed at the edge, which does not create an obstacle for viewing.…”

Status of BIPV and BAPV System for Less Energy-Hungry Building in India—A Review

“…This typical BAPV is also known as BAPVthermal (BAPV/T) water or air collector, where water or air will extract the additional heat energy A typical LSC consists of a glass or plastic-based square/rectangular-shaped waveguide luminophores, which absorbs a short-wavelength photon and convert them into long-wavelength. Further, due to total internal reflection, these photons finally reach the PV cells attached at the edge of the waveguide [106][107][108][109][110], as shown in Figure 4. The advantage of LSC-BIPV system is that the PV cells are placed at the edge, which does not create an obstacle for viewing.…”