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 language | English |
|---|---|
| Article number | 2301118 |
| Journal | Small Methods |
| Volume | 8 |
| Issue number | 3 |
| Early online date | 29 Nov 2023 |
| DOIs | |
| State | Published - 20 Mar 2024 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2023 The Authors. Small Methods published by Wiley-VCH GmbH.
Funding
K.K.Y. thanks the Shamoon College of Engineering, Beer Sheva, for providing infrastructure and financial support. The authors thank Dr. Dani Shahar of BioAnalytics, Ltd, Dr. Einat Nativ Roth from the Ilse Katz Institute for Nanoscale Science & Technology, and the designer Edna Rolnick for the cover picture design. H.K. acknowledges the Ariel HPC Center at Ariel University for providing computing resources.
| Funders | Funder number |
|---|---|
| Shamoon College of Engineering |
Keywords
- DPN
- MCS
- electrochemical sensors
- lead
- nano spherical cap shape