TY - JOUR
T1 - Vertical Gold Nanowires Stretchable Electrochemical Electrodes
AU - Zhai, Qingfeng
AU - Wang, Yan
AU - Gong, Shu
AU - Ling, Yunzhi
AU - Yap, Lim Wei
AU - Liu, Yiyi
AU - Wang, Joseph
AU - Simon, George P.
AU - Cheng, Wenlong
N1 - Publisher Copyright:
© 2018 American Chemical Society.
PY - 2018/11/20
Y1 - 2018/11/20
N2 - Conventional electrodes produced from gold or glassy carbon are outstanding electrochemical platforms for biosensing applications due to their chemical inertness and wide electrochemical window, but are intrinsically rigid and planar in nature. Hence, it is challenging to seamlessly integrate them with soft and curvilinear biological tissues for real-time wearable or implantable electronics. In this work, we demonstrate that vertically gold nanowires (v-AuNWs) possess an enokitake-like structure, with the nanoparticle (head) on one side and nanowires (tail) on the opposite side of the structure, and can serve as intrinsically stretchable, electrochemical electrodes due to the stronger nanowire-elastomer bonding forces preventing from interfacial delamination under strains. The exposed head side of the electrode comprising v-AuNWs can achieve a detection limit for H2O2 of 80 μM, with a linear range of 0.2-10.4 mM at 20% strain, with a reasonably high sensitivity using chronoamperometry. This excellent electrochemical performance in the elongated state, in conjunction with low-cost wet-chemistry fabrication, demonstrates that v-AuNWs electrodes may become a next-generation sensing platform for conformally integrated, in vivo biodiagnostics.
AB - Conventional electrodes produced from gold or glassy carbon are outstanding electrochemical platforms for biosensing applications due to their chemical inertness and wide electrochemical window, but are intrinsically rigid and planar in nature. Hence, it is challenging to seamlessly integrate them with soft and curvilinear biological tissues for real-time wearable or implantable electronics. In this work, we demonstrate that vertically gold nanowires (v-AuNWs) possess an enokitake-like structure, with the nanoparticle (head) on one side and nanowires (tail) on the opposite side of the structure, and can serve as intrinsically stretchable, electrochemical electrodes due to the stronger nanowire-elastomer bonding forces preventing from interfacial delamination under strains. The exposed head side of the electrode comprising v-AuNWs can achieve a detection limit for H2O2 of 80 μM, with a linear range of 0.2-10.4 mM at 20% strain, with a reasonably high sensitivity using chronoamperometry. This excellent electrochemical performance in the elongated state, in conjunction with low-cost wet-chemistry fabrication, demonstrates that v-AuNWs electrodes may become a next-generation sensing platform for conformally integrated, in vivo biodiagnostics.
UR - http://www.scopus.com/inward/record.url?scp=85056736855&partnerID=8YFLogxK
U2 - 10.1021/acs.analchem.8b03423
DO - 10.1021/acs.analchem.8b03423
M3 - 文章
C2 - 30350612
AN - SCOPUS:85056736855
SN - 0003-2700
VL - 90
SP - 13498
EP - 13505
JO - Analytical Chemistry
JF - Analytical Chemistry
IS - 22
ER -