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

Krishna K. Yadav, Dror Shamir, Haya Kornweitz, Yael Peled, Moshe Zohar, Ariela Burg

Research output: Contribution to journalArticlepeer-review

Abstract

Dip-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.

Original languageEnglish
Article number2301118
JournalSmall Methods
Volume8
Issue number3
Early online date29 Nov 2023
DOIs
StatePublished - 20 Mar 2024
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2023 The Authors. Small Methods published by Wiley-VCH GmbH.

Keywords

  • DPN
  • MCS
  • electrochemical sensors
  • lead
  • nano spherical cap shape

Fingerprint

Dive into the research topics of 'Development of Meta-Chemical Surface by Dip-Pen Nanolithography for Precise Electrochemical Lead Sensing'. Together they form a unique fingerprint.

Cite this