Journal of Nanoscience and Nanotechnology 2012-12-01

Self-assembly of L-cysteine for chiral recognition of mandelic acid in gas phase.

Hui-Shi Guo, Xiao-Yu Han, Woo-Sik Kim

Index: J. Nanosci. Nanotechnol. 12(12) , 8874-8, (2012)

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Abstract

This study demonstrates a new approach for the selective recognition of chiral mandelic acid by quartz crystal microbalance (QCM) using L-cysteine as the selector. The modification of L-cysteine on the QCM sensor was identified using resonant frequency detection, the contact angle, cyclic voltammetry, and X-ray photoelectron spectroscopy measurements. The chiral recognizability of L- and D-MA on the L-cysteine-modified surface was examined using QCM detection integrated with a vapor diffused molecular assembly reaction technique. The present chiral recognition results suggest that the L-cysteine is a good resolving agent for detecting chiral mandelic acid.