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Engineering two-dimensional metal oxides via surface functionalization for biological applications.

Baiyu Ren1, Yichao Wang2, Jian Zhen Ou3

  • 1School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China. jzou@swjtu.edu.cn jianzhen.ou@rmit.edu.au and School of Resources and Environmental Engineering, Mianyang Teachers' College, Mianyang, Sichuan, China.

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Summary

Two-dimensional metal oxides (2D MOs) offer unique properties for biomedical uses. Surface functionalization enhances their dispersity, stability, and biocompatibility for applications in biosensing, imaging, and drug delivery.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Biomedical Engineering

Background:

  • Two-dimensional metal oxides (2D MOs) possess unique physicochemical properties like high photothermal response, photoluminescence, and catalytic capabilities.
  • Their inherent low toxicity and tuneable properties through oxygen vacancies or doping make them promising for biological applications.
  • The large surface-to-volume ratio facilitates surface functionalization for improved interaction with biological systems.

Purpose of the Study:

  • To review the current progress in functionalizing 2D MOs for diverse biological applications.
  • To highlight the importance of surface modification for enhancing dispersity, stability, and biocompatibility of 2D MOs in physiological environments.
  • To discuss the potential of 2D MOs in biosensors, bioimaging, drug/gene delivery, and therapeutic applications.

Main Methods:

  • Review of existing literature on the functionalization of 2D MOs.
  • Analysis of the impact of surface modification strategies (physical/chemical) on 2D MO properties.
  • Exploration of property tuning via oxygen vacancies and doping for enhanced biological performance.

Main Results:

  • Functionalized 2D MOs demonstrate significant potential in biosensing, bioimaging, and drug/gene delivery systems.
  • Surface functionalization strategies effectively improve the dispersity, stability, and biocompatibility of 2D MOs.
  • Tuneable properties of 2D MOs through doping and oxygen vacancies expand their utility in advanced biomedical applications.

Conclusions:

  • 2D MOs, particularly when functionalized, represent a versatile platform for numerous biomedical applications.
  • Further research into overcoming technological limitations and addressing challenges is crucial for clinical translation.
  • Future trends point towards novel functionalization techniques and expanded therapeutic roles for 2D MOs.