Shape control of zincblende CdSe nanoplatelets. Issue 80 (19th September 2016)

• Record Type: Journal Article
• Authors: Bertrand, Guillaume H. V.; Polovitsyn, Anatolii; Christodoulou, Sotirios; Khan, Ali Hossain; Moreels, Iwan
• Is Part Of: Chemical communications. Volume 52:Issue 80(2016)
• Page Start: 11975
• Page End: 11978
• Publication Date: 2016-09-19
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1039/c6cc05705e
• Languages: English
• ISSNs: 1359-7345

Abstract

Abstract : Water matters: the aspect ratio of CdSe nanoplatelets can be precisely tuned by adjusting the fraction of hydrated cadmium acetate in the synthesis. Abstract : The lateral dimensions of CdSe nanoplatelets have a strong and unique influence on their opto-electronic properties, with sizes that can be tuned from the weak to the strong exciton confinement regime. There are state-of-the-art reports on several nanoplatelet syntheses; however, at present only the thickness is well-controlled. We demonstrate here that we can achieve a control over the aspect ratio and overall nanoplate area by carefully adjusting the reagents that induce the in-plane growth. A variation of the fraction of hydrated Cd(OAc)2 in a Cd(OAc)2 /Cd(OAc)2 ·2H2 O mixture tailors the nanoplatelet aspect ratio. This occurs independently of the reaction time, which can be used to fine-tune the overall length and width. An interpretation is given by the in situ formation of a small amount of hydroxide anions that alter the surface energy of specific planes.