Carbon Pipette-Based Electrochemical Nanosampler

Carbon Pipette-Based Electrochemical Nanosampler

Yun Yu , Jean-Marc Noël , and Michael V. Mirkin,
Department of Chemistry and Biochemistry, Queens College−CUNY, Flushing, New York 11367, United States
Yang Gao §, Olha Mashtalir §, Gary Friedman §, and Yury Gogotsi *§
Department of Electrical and Computer Engineering, Department of Materials Science and Engineering, and §A.J. Drexel Nanotechnology Institute, Drexel University, 3141 Chestnut Street, Philadelphia, Pennsylvania 19104, Unites States
Anal. Chem., Article ASAPx
DOI: 10.1021/ac403547b
Publication Date (Web): March 21, 2014
Copyright © 2014 American Chemical Society
*Y. Gogotsi. E-mail: Этот e-mail адрес защищен от спам-ботов, для его просмотра у Вас должен быть включен Javascript .

Abstract

Sampling ultrasmall volumes of liquids for analysis is essential in a number of fields from cell biology to microfluidics to nanotechnology and electrochemical energy storage. In this article, researches demonstrate the possibility of using nanometer-sized quartz pipettes with a layer of carbon deposited on the inner wall for sampling attoliter-to-picoliter volumes of fluids and determining redox species by voltammetry and coulometry.

Very fast mass-transport inside the carbon-coated nanocavity allows for rapid exhaustive electrolysis of the sampled material. By using a carbon pipette as the tip in the scanning electrochemical microscope (SECM), it can be precisely positioned at the sampling location.

The developed device is potentially useful for solution sampling from biological cells, micropores, and other microscopic objects.

Source: www.pubs.acs.org

 

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