Micron-sized gold plates were prepared by reducing chloroauric acid with lemongrass extract. Their two-photon luminescence (TPL) and second harmonic generation (SHG) were investigated. The results show that the TPL and SHG intensity of gold plates is dependent on the wavelength and polarization of excitation laser. The TPL intensity of gold plates decreases with the increase of the excitation w...

The application of green-synthesis principles is one of the most impressive research fields for the production of nanoparticles. Different kinds of biological systems have been used for this purpose. In the present study, AuNPs (gold nanoparticles) were prepared within a short time period using a fresh cell extract of the marine microalga Tetraselmis suecica as a reducing agent of HAuCl4 (chlor...

The Turkevich synthesis method of Au nanoparticles (AuNPs) was adopted for direct fabrication of SiO2@Au and TiO2@Au core-shell nanostructures. In this method, chloroauric acid was reduced with trisodium citrate in the presence of amine-functionalized silica or titania submicroparticles. Core-shells obtained in this way were compared to structures fabricated by mixing of Turkevich AuNPs with am...

Developing rapid, efficient, highly sensitive, simple, stable, and low-cost virus marker detection products that are appropriate for basic facilities is of great importance in the early diagnosis treatment viruses. Naked-eye methods especially important when medical testing limited. Polystyrene nanospheres (PSs) with catalytic specific recognition functions were successfully developed by simult...

Chemotherapy side effects, drug resistance, and tumor metastasis hinder the progress of cancer treatments, which has led to patients having a poor prognosis. In recent years, nanoparticles (NPs) have become an emerging trend in delivery technology. The biosynthesis gold (AuNPs) from lactic acid as probiotic metabolites is cost-efficient eco-friendly approach due widespread availability ease cul...

Gold star (AuST), which is one of the important anisotropic gold structures, finds applications in catalysis, sensing, and photothermal therapy by virtue its branches high aspect ratio. The preparation AuSTs can prove challenging as it requires stringent reaction condition(s) solution composition including various chemical additives, are not suitable for either disposal environment or use healt...

A fast, specific, sensitive, convenient, and economical rapid-dot-immunogold staining (R-Dot-IGS) assay was used to detect serum antibodies in patients infected with Schistosoma japonicum. The soluble egg antigen of Schistosoma japonicum was added onto microspore membrane. After pre-reacting and blocking, the serum to be detected and sheep anti-human IgG labeled with chloroauric acid were added...

Anisotropic metallic nanoparticles (NPs) possess unique optical properties, which lend them to applications such as surface-enhanced Raman scattering (SERS). However, their preparation by an efficient, biocompatible and high yield synthetic method is still challenging. In this work, we demonstrate a simple and reproducible way to produce chitosan (CS) encapsulated gold-silver nanoflowers by seq...