Aqueous-phase synthesized CdTe quantum dots: an insight into nanoparticle architecture-quantum yield relationship, characterization, and computational study of small clusters

Abstract

Increased interest in luminescent nanoparticles has made it possible to identify the feasibility of developing novel materials or improving existing materials, including designing materials at the nanoscale that can be...

Bacterial nanocellulose and CdTe quantum dots: assembled nanopaper for heavy metal detection in aqueous solution

“…A reaction time of 4 hours was necessary to obtain QDs with the highest QY (43%). 35 The CdTe-TGA QDs were precipitated with acetone and then purified by centrifugation at 8000 rpm for 10 min, followed by dissolution and precipitation in water and acetone, respectively.…”

“…The CdTe QDs were synthesized following a previously published procedure. [33][34][35] Briefly, CdCl 2 (12 mmol, 2.19 g) and TGA (1.44 mmol, 1.7 mL) were reacted to form carboxylate. NaOH 2 M was slowly added to adjust the pH to basic values (8-10).…”

Alkyne-Functionalized Platinum Chalcogenide (S, Se) Nanoparticles

“…Metal chalcogenide nanoparticles have been attracting extensive attention, due to their unique optical and electronic properties and significant potential in various applications, such as optoelectronics, photovoltaics, catalysis, energy storage, and biomedicine. − These nanoparticles are typically synthesized via colloidal, hydro/solvothermal heating methods and stabilized by select organic ligands, − such as derivatives of thiol (–SH), phosphine oxide (OPR 3 ), phosphonyl (–PO­(OR) 2 ), amine (−NH 2 ), and carboxyl (−COOH), leading to ready manipulation of their hydrophilicity, surface charge, tensile stress, dipole moment, catalytic performance, etc. ,− Yet in these earlier studies, the ligands are bound onto the nanoparticles mostly by nonconjugated interfacial linkages, which drastically limit the electronic coupling between the inorganic cores and organic functional moieties. − Such electronic interactions are anticipated to be markedly enhanced with conjugated interfacial points of anchor. This has indeed been demonstrated with acetylene-functionalized metal nanoparticles/clusters, where the hybridization between the π electrons of the acetylene moiety and metal d electrons leads to strong intraparticle charge delocalization. − …”