Development of Meta‐Chemical Surface by Dip‐Pen Nanolithography for Precise Electrochemical Lead Sensing

Author:

Yadav Krishna K.1,Shamir Dror2,Kornweitz Haya3,Peled Yael2,Zohar Moshe4,Burg Ariela1ORCID

Affiliation:

1. Department of Chemical Engineering Sami Shamoon College of Engineering Beer‐Sheva 8410802 Israel

2. Analytical Chemistry Department NRCN Beer‐Sheva Israel

3. Chemical Sciences Department Ariel University Ariel Israel

4. Department of Electrical and Electronics Engineering Sami Shamoon College of Engineering Beer Sheva 8410802 Israel

Abstract

AbstractDip‐pen nanolithography (DPN) is a powerful and unique technique for precisely depositing tiny nano‐spherical cap shapes (nanoclusters) onto a desired surface. In this study, a meta‐chemical surface (MCS; a pattern with advanced features) is developed by DPN and applied to electrochemical lead sensing, yielding a calibration curve in the ppb range. An ink mixture of PMMA and NTPH (which binds to Pb (II), as supported by DFT calculations) is patterned over a Pt surface. The average height of the nanoclusters is ≈13 nm with a high surface area‐to‐volume ratio, which depends on the ink composition and the MCS surface. This ratio affected the sensitivity of the MCS as a detecting tool. The results indicate that the sensor's features can be controlled by the ability to control the size of the nanoclusters, attributed to the unique properties of the DPN production method. These results are significant for the water‐source purification industry.

Publisher

Wiley

Subject

General Materials Science,General Chemistry

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