Budhika G. Mendis

Abstract: Silver nanoparticles (AgNPs) are currently among the most widely used man-made nanomaterials, present in a huge range of consumer products. Here we report a simple ‘green’ method of AgNP synthesis of using an anionic surfactant without use of any additional reducing agents. It was observed that synthesis of AgNPs at room temperature (25–35 °C) using sodium dodecyl sulphate (SDS) and sunlight. The nanoparticles have been characterised using high-resolution transmission electron spectroscopy (HRTEM), UV–vis spectrophotometry, X-ray photoelectron spectroscopy (XPS) and Fourier Transform Infrared Spectroscopy (FTIR) and are found to have an average diameter of 30 nm. The nanoparticles are water soluble and the nature of the process is amenable to scaling up.

TL;DR: Fiducia et al. as mentioned in this paper showed that selenium enables higher luminescence efficiency and longer diffusion lengths in the alloyed material, indicating that Selenium passivates critical defects in the bulk of the absorber layer.

TL;DR: In this article, the authors measured the recombination velocity of the heterointerfaces between Cu2ZnSnS4 (CZTS) and CuxSnySz, SnS secondary phases precipitated along the grain boundaries as well as ZnS precipitated within the CZTS grain interiors.

TL;DR: In this paper, chemical analysis of individual atom columns was carried out to determine the crystal structure and local point defect of Cu2ZnSnS4, and direct evidence for a nanoscale composition inhomogeneity, in the form of Zn enrichment and Cu depletion, was obtained.

TL;DR: In this paper, X-ray Photoemission Spectroscopy (XPS) of the TiO 2 :Fe nanoparticles was performed to study the electronic structure of the nanoparticles.