Estimating Quantum Dot Size with Pulsed Field Gradient NMR

被引：2

作者：

Ryswyk, Hal Van ^{[1
]}

Porter, Hanna Z. ^{[1
]}

Seto, Connor K. M. ^{[1
]}

Lopez, Ixchel ^{[1
]}

Dy, Emma ^{[1
]}

机构：

[1] Harvey Mudd Coll, Dept Chem, Claremont, CA 91711 USA

来源：

JOURNAL OF CHEMICAL EDUCATION | 2023年 / 100卷 / 05期

基金：

美国国家科学基金会;

关键词：

Upper-Division Undergraduate; Inorganic Chemistry; Physical Chemistry; Interdisciplinary; Multidisciplinary; Laboratory Instruction; Hands-On Learning; Manipulatives; Colloids; Instrumental Methods; Materials Science; Microscale Lab; NMR Spectroscopy; Semiconductors; Synthesis; UV-Vis Spectroscopy; NUCLEAR-MAGNETIC-RESONANCE; COLLOIDAL NANOCRYSTALS; DIFFUSION; DOSY;

D O I：

10.1021/acs.jchemed.3c00155

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Pulsed field gradient nuclear magnetic resonance (NMR) is used to estimate the size of quantum dots (QDs) produced in a simple, fast, small-scale synthesis. This upper-division laboratory experiment teaches the basics of QD synthesis and pulsed field gradient NMR, a powerful technique for measuring diffusion coefficients in solution. The diffusion coefficients are used to calculate hydrodynamic radii, which are compared to core radii obtained from optical absorbance sizing curves, providing insight into the structure of QDs in colloidal suspension and the nature of the information provided by pulsed field gradient NMR.

引用

页码：2021 / 2026

页数：6

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