Scholarlink

<p>Photoelectrochemical (PEC) biosensors have attracted significant interest due to their inherent advantages of high sensitivity, excellent biocompatibility, and ease of miniaturization. In this study, efficient WO<sub>3</sub>-based photoelectrodes were developed via a novel one-step laser-scribing strategy, enabling the <i>in-situ</i> synthesis of patterned, flexible WO<sub>3</sub>-decorated porous graphene electrodes (LIG-WO<sub>3</sub>) using H<sub>2</sub>WO<sub>4</sub>-coated polyimide (PI) film as the precursor. The localized high temperature and reducing atmosphere generated during laser irradiation simultaneously convert the PI into laser-induced graphene and decompose H<sub>2</sub>WO<sub>4</sub>, yielding photoactive WO<sub>3</sub> and conductive metallic W nanoparticles embedded in the porous graphene matrix. The optimized LIG-WO<sub>3</sub> photoelectrode exhibits a rapid photoelectric response under visible Light illumination at 0 V applied bias, enabling self-powered PEC sensing. A visible light-driven, self-powered PEC aptasensor was fabricated by immobilizing an oxytetracycline (OTC) specific aptamer onto the photoelectrode surface. The Sensor exhibits a Linear response toward OTC in the range 1.0 -1.0&#xa0;× 10<sup>3</sup> nM, with a low detection Limit of 0.68 nM (S/N = 3) as well as high stability, reproducibility and applicability in real sample analysis. This work demonstrates the significant promise of one-step laser-induced WO<sub>3</sub> electrodes for advancing self-powered PEC sensing applications.</p> Graphical Abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Laser-induced WO3-decorated porous graphene for portable and self-powered photoelectrochemical aptasensing

  • 期刊论文

  • 发表日期：

    2025年9月19日

查看全文
  • Lulu Zhang,
  • Lingbo Liu,
  • Jiang Guo,
  • Jingdong Zhang,
  • Kai Yan

摘要

Photoelectrochemical (PEC) biosensors have attracted significant interest due to their inherent advantages of high sensitivity, excellent biocompatibility, and ease of miniaturization. In this study, efficient WO3-based photoelectrodes were developed via a novel one-step laser-scribing strategy, enabling the in-situ synthesis of patterned, flexible WO3-decorated porous graphene electrodes (LIG-WO3) using H2WO4-coated polyimide (PI) film as the precursor. The localized high temperature and reducing atmosphere generated during laser irradiation simultaneously convert the PI into laser-induced graphene and decompose H2WO4, yielding photoactive WO3 and conductive metallic W nanoparticles embedded in the porous graphene matrix. The optimized LIG-WO3 photoelectrode exhibits a rapid photoelectric response under visible Light illumination at 0 V applied bias, enabling self-powered PEC sensing. A visible light-driven, self-powered PEC aptasensor was fabricated by immobilizing an oxytetracycline (OTC) specific aptamer onto the photoelectrode surface. The Sensor exhibits a Linear response toward OTC in the range 1.0 -1.0 × 103 nM, with a low detection Limit of 0.68 nM (S/N = 3) as well as high stability, reproducibility and applicability in real sample analysis. This work demonstrates the significant promise of one-step laser-induced WO3 electrodes for advancing self-powered PEC sensing applications.

Graphical Abstract