Enhanced Red Emission in Ultrasound‐Assisted Sol‐Gel Derived ZnO/PMMA Nanocomposite

Abstract

Cost-effective methods for preparing ZnO nanostructures are of importance for the deployment of ZnO in many applications including n-type conduits, catalysts, nanophosphor, and optoelectronics. Herein, we present a room-temperature sol-gel method with the aid of ultrasonication to prepare white-emitting ZnO nanoparticles (NPs). X-ray diffraction and electron microscopic analyses revealed that the size and shape of ZnO NPs can be controlled simply by changing the concentration of the Zn precursor.e ZnO NPs had a broad photoluminescence emission, ranging from 450 nm to 800 nm, while their composite in PMMA matrix showed an enhancement in the red region induced by ZnO-PMMA interfacial band-bending effects. e results demonstrated herein promise a simple tool for control over size, shape, and emission of ZnO materials for diverse applications.

Tuning the Emission Color of Hydrothermally Synthesized Carbon Quantum Dots by Precursor Engineering

“…When compared with mature nontoxic QDs, e.g. InP [3], Si [4][5][6][7] or visible luminescence ZnO particle [8], CQDs have advantages of large chemical abundance and cost-effective synthesis but the information relating to chemical structures and photoluminescence origin of CQDs is lag behind. Among a vast number of reported CQDs, CQDs derived from CA and EDA are probably the CQDs that have been described in most detail [9][10][11].…”