One-pot synthesis optimization of thiol-capped SnS and SnS/ZnS QDs for photocatalytic degradation of Rhodamine 6G.

Interest in SnS-based quantum dots (QDs) has increased due to their low toxicity, widespread natural availability, and superior electro-optical characteristics suitable for photodegradation applications. Herein, we report the synthesis of SnS-based QDs using thiourea and tin (II)chloride as salt precursors. The study explored the impact of various synthetic parameters such as pH, capping ligand, Sn:S ratio, reaction solvent, and ZnS shell on the optical characteristics of the synthesized QDs.

The impact of silver nanoclay functionalisation on optical and electrochemical properties.

Three different fractions of nanoclay (nanomer 1.44P) were functionalised with Ag forming silver nanoclay composites (Ag/nanomer 1.44P).

Photodynamic Therapy and Antibacterial Activities of a Novel Synthesized Quaternary Zn-Cu-In-S/ZnS QDs- mTHPP Porphyrin Conjugate.

Background: Photodynamic therapy (PDT) is a non-invasive treatment modality that destroys abnormally growing cells or microorganisms. Porphyrins are used as photosensitizers in PDT; however, their clinical application has been limited by their poor water solubility, resulting in aggregation and low quantum yields of reactive oxygen species (ROS).

Methods: To overcome these limitations and improve PDT efficacy, we herein report the conjugation of ZnCuInS/ZnS (ZCIS/ZnS) quantum dots (QDs) to 5,10,15,20-tetrakis(3-hydroxyphenyl)porphyrin (mTHPP).

Electrochemistry as a Complementary Technique for Revealing the Influence of Reducing Agent Concentration on AgNPs.

The synthesis process of AgNPs has been attracting a lot of attention in the fields of biosensors/sensors, diagnostics, and therapeutic applications. An attempt to understand the effect of different concentrations of reducing agents on the synthetic design process has been made. In this paper, we gather information on voltammetry studies and relate it with UV-vis and scanning electron microscopy (SEM) analyses.

Cytotoxicity, fluorescence tagging and gene-expression study of CuInS/ZnS QDS - meso (hydroxyphenyl) porphyrin conjugate against human monocytic leukemia cells.

The toxicity of heavy metals present in binary semiconductor nanoparticles also known as quantum dots (QDs) has hindered their wide applications hence the advent of non-toxic ternary quantum dots. These new group of quantum dots have been shown to possess some therapeutic action against cancer cell lines but not significant enough to be referred to as an ideal therapeutic agent. In this report, we address this problem by conjugating red emitting CuInS/ZnS QDs to a 5,10,15,20-tetrakis(3-hydroxyphenyl)porphyrin -photosensitizer for improved bioactivities.

Synthesis of meso-tetra-(4-sulfonatophenyl) porphyrin (TPPS) - CuInS/ZnS quantum dots conjugate as an improved photosensitizer.

Background:  Metal-free, water-soluble and highly stable meso-tetra-(4-sulfonatophenyl) porphyrin (TPPS) has been studied for their singlet oxygen quantum yield. However, TPPS suffers from inherent shortcomings. To address these, TPPS was conjugated to ternary copper indium sulphide/ zinc sulphide (CuInS/ZnS) quantum dots (QDs).