Electrogenerated Chemiluminescence of Near-Infrared-Emitting CdSe@CdSe Nanorods in Aqueous Solution. Issue 6 (14th April 2020)

• Record Type: Journal Article
• Authors: Zhuang, Yafeng; Zheng, Yilong; Saavedra, S. Scott; Pavlopoulos, Nicholas G.; Pyun, Jeffrey
• Is Part Of: Journal of the Electrochemical Society. Volume 167:Issue 6(2020)
• Publication Date: 2020-04-14
• Subjects: Electrochemiluminescence -- CdSe@CdSe Nanorods -- Near-infrared-emitting -- Aqueous solution; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/1945-7111/ab864c
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : Electrogenerated chemiluminescence (ECL) was observed from TOPO-capped CdSe@CdSe nanorods (NRs) depositing on a metal electrode in phosphate buffer solution (PBS). Two ECL peaks at −1.05 and −1.33 V in pH 9.2, 0.1 M PBS were found under cyclic voltammetric conditions. Cyclic voltammetry of this solution displayed no distinctive features, on the other hand, light emission was observed during cyclic potential scans. The photoluminescence (PL) spectrum showed an emission maximum at 692 nm. The spectrum of ECL possesses one peak which coincides very well with the PL spectrum of the nanorods film. The mechanism for ECL peaks was proposed. Electron transfer reactions between charged nanorods and molecular redox-active coreactants such as dissolved oxygen and H2 O2 or between positively and negatively charged nanorods occurred that led to electron and hole annihilation, producing light.