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<p>Copper (Cu<sup>2+</sup>) is a vital nutrient in the growth of certain plants. Thus, it is important to monitor the concentration of copper in agriculture. Electrochemically reduced graphene oxide (ERGO) was electrodeposited on an inexpensive, flexible carbon cloth (CC) substrate, and the deposition process was optimized for voltammetric detection of Cu<sup>2+</sup>. The resulting ERGO-CC sensors were used to quantify CuSO<sub>4</sub> concentrations down to 9&#xa0;nM (S/N &gt; 3), while the ERGOon glassy carbon electrode could detect down to 7&#xa0;nM (S/N &gt; 3). The sensors detected copper from real samples and in the presence of other potentially interfering compounds contained in fertilizers.</p> Graphical abstract <p></p>

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Detection of copper in plants and soil with electrochemically reduced graphene oxide–carbon cloth sensors

  • 期刊论文

  • 发表日期：

    2026年7月8日

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  • Rebekah De Penning,
  • Sarah Pierce,
  • Sonal Padalkar

摘要

Copper (Cu2+) is a vital nutrient in the growth of certain plants. Thus, it is important to monitor the concentration of copper in agriculture. Electrochemically reduced graphene oxide (ERGO) was electrodeposited on an inexpensive, flexible carbon cloth (CC) substrate, and the deposition process was optimized for voltammetric detection of Cu2+. The resulting ERGO-CC sensors were used to quantify CuSO4 concentrations down to 9 nM (S/N > 3), while the ERGOon glassy carbon electrode could detect down to 7 nM (S/N > 3). The sensors detected copper from real samples and in the presence of other potentially interfering compounds contained in fertilizers.

Graphical abstract