Compositional changes taking place during the synthesis of alloyed CdSeZnS nanocrystals (NCs) allow shifting of the optical features to higher energy as the NCs grow. Under certain synthetic conditions, the effect of those changes on the surface/interface chemistry competes with and dominates over the conventional quantum confinement effect in growing NCs. These changes, identified by means of complementary advanced spectroscopic techniques such as XPS (X-ray photoelectron spectroscopy) and XAS (X-ray absorption spectroscopy), are understood in the frame of an ion migration and exchange mechanism taking place during the synthesis. Control over the synthetic routes during NC growth represents an alternative tool to tune the optical properties of colloidal quantum dots, broadening the versatility of the wet chemical methods.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/acs.jpclett.8b00741 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Performance enhancement of InSnZnO thin-film transistors by modifying the dielectric-semiconductor interface with colloidal quantum dots.
Nanoscale Adv
December 2024
Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, State Key Laboratory of Radio Frequency Heterogeneous Integration, College of Physics and Optoelectronic Engineering, Shenzhen University Shenzhen 518060 China
Thin film transistors (TFTs) with InSnZnO (ITZO) and AlO as the semiconductor and dielectric layers, respectively, were investigated, aiming to elevate the device performance. Chemically synthesized CuInS/ZnS core/shell colloidal quantum dots (QDs) were used to passivate the semiconductor/dielectric interface. Compared with the pristine device, the device with the integrated QDs demonstrates remarkably improved electrical performance, including a higher electron mobility and a lower leakage current.
View Article and Find Full Text PDFCarbon dot embedded hybrid microgel from synthesis to sensing: Experimental and theoretical approach.
Anal Chim Acta
February 2025
Department of Chemistry and Centre of Advanced Studies in Chemistry, Panjab University, Chandigarh, 160014, India; Department of Applied Chemistry, Maulana Abul Kalam Azad University of Technology, Simhat, Haringhata, West Bengal, 741249, India. Electronic address:
Background: The intellectual progress in fabricating artificial probes for selective appraisal of biologically admissible amino acids has displayed exponential growth in recent era.The neoteric era in material science has witnessed the significant application of carbon quantum dots (CQDs). However, the hybrid microgel of CQDs was less explored.
View Article and Find Full Text PDFAnion vacancy engineered Cu/ZnInS-V/TiO-V S-scheme heterojunction for enhancing photocatalytic overall water splitting.
J Colloid Interface Sci
January 2025
National Center for International Research on Photoelectric and Energy Materials, Yunnan Key Laboratory for Micro/Nano Materials & Technology, School of Materials and Energy, Yunnan University, Kunming 650091 China; Southwest United Graduate School, Kunming 650091 China. Electronic address:
Heterojunction materials for photocatalytic overall water splitting (POWS) become popular in recent times. However, even in the superior S-scheme heterojunction, the two semiconductor materials still do not have an efficient activity to separate and migrate photogenerated carriers. To further improve the charge separation and enhance the activity of POWS, a novel S-scheme heterojunction photocatalyst, Cu/ZnInS-V/TiO-V, was synthesized using solvothermal and calcination methods.
View Article and Find Full Text PDFMicrowave-assisted synthesis of carbonized polymer dots/CdS quantum dots/BiWO Z-scheme heterojunctions: Enhancing photocatalytic environmental remediation via dual-quantum dot heterostructures.
J Colloid Interface Sci
January 2025
Faculty of Science, Kunming University of Science and Technology, Kunming 650500, China.
The fabrication of dual-quantum dot heterostructures offers a promising strategy to enhance the environmental remediation performance of photocatalysts. Herein, a BiWO-based Z-scheme heterojunction was constructed by incorporating carbonized polymer dots (CPDs) and CdS quantum dots (QDs) via a microwave-assisted solvothermal method. The 1 wt% CPDs/CdS QDs/BiWO (CCBW-1) composite achieved optimal Cr(VI) removal, reaching 97.
View Article and Find Full Text PDFSmartphone-assisted hydrogel sensing platform based on double emission carbon dots for portable on-site tetracycline detection.
Mikrochim Acta
January 2025
Department of Chemistry and Material Engineering, Lyuliang University, Lyuliang, 033000, P. R. China.
Innovative double-emission carbon dots (DE-CDs) were synthesized via a one-step hydrothermal method using fennel and m-phenylenediamine (m-PD) as precursors. These DE-CDs exhibited dual emission wavelengths at 432 and 515 nm under different excitations, making them highly versatile for fluorescence-based applications. The fluorescence of the DE-CDs was efficiently quenched by tetracycline (TC) through the inner filter effect (IFE), allowing for the construction of a sensitive dual-response fluorescent sensor.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!