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Surface Functionalized Titanium Nitride Electrode for CMOS Compatible Bioelectronic Devices.

Meng Yu^1,2,3, Xiaohui Tang^2,3, Shijia Yang⁴

¹School of Microelectronics, Shanghai University, Chengzhong Road 20, Shanghai, 201800, China.

|April 17, 2024

Summary

This summary is machine-generated.

This study presents a new method to modify titanium nitride (TiN) electrodes with hydroxyl groups for advanced bioelectronic devices. This functionalization enables high-throughput DNA synthesis and data storage applications.

Keywords:

DNA synthesis bioelectronics covalent grafting diazonium salt titanium nitride (TiN)

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Area of Science:

Bioelectronics
Materials Science
Surface Chemistry

Background:

Bioelectronic devices require high throughput and resolution, but electrode materials often lack semiconductor manufacturing compatibility.
Titanium nitride (TiN) is a CMOS-compatible material suitable for bioelectronic and electrocatalytic systems.
Efficient surface functionalization methods for TiN are crucial for developing advanced applications.

Purpose of the Study:

To develop an efficient method for functionalizing titanium nitride (TiN) surfaces with hydroxyl groups.
To explore the potential of modified TiN electrodes for DNA data storage and high-throughput DNA synthesis.
To demonstrate the applicability of the functionalization protocol for future bioelectronic devices.

Main Methods:

Surface functionalization of TiN via electroreduction of 4-(2-hydroxyethyl)benzenediazonium salt.
Cyclic voltammetry (CV) was used to control the thickness of the modification layer.
Characterization techniques including CV, AFM, SEM, and XPS confirmed successful grafting of hydroxyl groups.
Proof-of-principle experiments for DNA data storage using Cy3-phosphoramidite coupling.

Main Results:

Successful covalent grafting of an organic thin film with hydroxyl groups onto the TiN surface was achieved.
Characterization confirmed the electrochemical properties, surface morphology, and chemical structure changes.
Demonstrated proof-of-concept for DNA data storage on modified TiN electrodes.
Reproducible results on TiN microarray chips indicate broad applicability.

Conclusions:

The developed electroreduction method provides an efficient route for TiN surface functionalization.
Modified TiN electrodes show significant potential for DNA data storage and high-throughput DNA synthesis.
This technique is promising for the advancement of various bioelectronic devices, including biosensors and molecular manipulation tools.