[Paper reivew] Multilayer Carbon Nanotube/Gold Nanoparticle Composites on Ga-based Liquid Metals for Electrochemical Biosensing (Abstract and Introduction)

This section will be written in only English because I have to improve my language skills to survive here in the United States unless I should go back to my hometown...

 

• Title
  Multilayer Carbon Nanotube/Gold Nanoparticle Composites on Gallium-Based Liquid Metals for Electrochemical Biosensing
• Authors
  Taehwan Lim and Huanan Zhang
• The name of the Journal
  ACS Applied Nano Materials
• Published: November 10, 2021

 

I used the application called "liquid text" to read the paper effectively, and this paper can be easily found by searching on google scholar. Just in case you cannot find it, here is the DOI: https://doi.org/10.1021/acsanm.1c03244.

 

Why did I choose this paper?

 First of all, I need to study Ga's properties and how to deposit on Ga using nanomaterials for my future research; therefore, I thought this paper would be good for getting knowledge of overall electrochemical experiments using Ga.

 Second, they used much experimental equipment such as FTIR, potentiostat, and SEM. Thus, I thought this paper would be helpful to broaden my perspective to analyze the results when I do electrochemical experiments.

 

Abstract

Summary

 - Motivation of this study

 : Liquid metals used in biosensors are susceptible to oxidation and corrosion; Develop nanometerial electrochemical deposition methods to prevent the oxidation process. Thus, this study aims to enhance both the biostability and electrochemical properties.

 

- Methods

1) Carbon deposition on Ga for preventing oxidation of Ga.

2) Au deposition on Ga for improving electrochemical properties.

 

- Results

1) The high sensitivity

2) Good for detecting dopamine

3) The fast responsiveness

 

Introduction

- Motivation of this study 

1) The monitoring of biomolecules is important for health management purposes.

2) Electrochemical biosensors can detect targets without labels (label-free).

3) To minimize the mechanical mismatch between the electronic devices and soft tissues.

 

- Current problems

1) Liquid metals are prone to oxidization, which deteriorates their electrical properties.

2) Low biocompatibility due to the leakage of liquid metals

For the solution of 1) and 2): Hermetic encapsulation.

 

- Solutions

: Electrochemical deposition of nanomaterials on Ga to enhance biostability and increase electroactive surface area.

 

- Challenges

1) Should use an aqueous solution for biological conditions, but Ga is susceptible to oxidation and corrosion in an aqueous solution. 

2) How to uniformly deposit nanomaterials on Ga.

3) How to prevent leakage problem of Ga if the nanomaterials deposit porously. 

 

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