This study reports a one-step process to produce single-stranded deoxyribonucleic acid (ssDNA) functionalized reduced graphene oxide (ssDNA/rGO). The ssDNA acts as a reducing agent for the reduction of GO into rGO and simultaneously performs functionalization onto rGO, which is confirmed by spectroscopic and microscopic analyses. Such reduction capability is not being observed in double-stranded DNA (dsDNA). The high charge density of ssDNA on rGO is investigated for its application in electrochemical supercapacitor, and it is revealed that the ssDNA/rGO exhibits a specific capacitance of 129 F g⁻¹ with high stability (92%) up to 10,000 cycles. The findings open the gateway to develop a biomolecule-based energy storage system.

本研究报告了一种生产单链脱氧核糖核酸 (ssDNA) 功能化还原氧化石墨烯 (ssDNA/rGO) 的一步法。ssDNA 作为还原剂将 GO 还原为 rGO，同时对 rGO 进行功能化，这通过光谱和显微镜分析得到证实。在双链 DNA (dsDNA) 中没有观察到这种还原能力。研究了 ssDNA 在 rGO 上的高电荷密度在电化学超级电容器中的应用，结果表明 ssDNA/rGO 表现出 129 F g ^-1的比电容和高达 10,000 次循环的高稳定性（92%）。这些发现为开发基于生物分子的储能系统打开了大门。