Cation exchange of aqueous CuInS₂ quantum dots

Abstract

Chalcopyrite copper indium disulfide (CIS) QDs have been of recent interest due to their non-toxicity. This article shows a straightforward aqueous cation exchange method to synthesise CIS particles with zinc sulfide coating.

CuInS2/ZnS nanocrystals as sensitisers for NiO photocathodes

“…The absorbance and emission spectrum of CuInS 2 core NCs, may be found in the supporting information (ESI), Figure S1. The broad emission peak for the CuInS 2 /ZnS NCs appears in the visible region at 590 nm, the tail end of the peak stretches out across the infrared region, consistent with the emission spectra for CuInS 2 /ZnS NCs 31,35 .…”

“…While the absorbance spectrum shows a broad peak, no strong excitonic peak is present. The broad features for the absorption spectrum and lack of excitonic peak has been reported previously and attributed to surface defects in the NCs 25,31 . The absorbance and emission spectrum of CuInS 2 core NCs, may be found in the supporting information (ESI), Figure S1.…”

“…CuInS 2 /ZnS NCs were synthesised according to our previous report 31 . Briefly, 0.5 mL Cu(Ac) 2 (0.125 M) and 0.5 mL InCl 3 (0.125 M) were injected into 37.5 mL of Milli--Q water at ambient temperature.…”

Thiol-Capped Gold Nanoparticles Swell-Encapsulated into Polyurethane as Powerful Antibacterial Surfaces Under Dark and Light Conditions

“…Substantial efforts have been made on the production of nanoparticles where their unique and interesting properties can be tailored by adjusting their particle size and shape202122. Gold nanoparticles (AuNPs) and other gold-based nanomaterials have generally been considered inert, non-toxic and bio-compatible232425 and AuNPs continue to show great potential as therapeutic and medical imaging agents2627282930, AuNPs possess a high surface-to-volume ratio, easily tunable size, and facile surface modification, rendering them versatile platforms for healthcare materials313233.…”

Optimization of the recipe for the synthesis of CuInS2/ZnS nanocrystals supported by mechanistic considerations

“…Cd, Pb, Se, and Te) awoke environmental and healthcare concerns. Recently, many researchers turned their attention to the type I-III-VI semiconductor nanocrystals, in particular, CuInS 2 (CIS), which is presently the most attractive and lesser toxic alternative combination [13]. CIS is direct band-gap ternary semiconductor with low toxicity, high optical absorption coefficients (10 5 cm −1 ) [14], and high photochemical stability [15].…”