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Vertical Gold Nanowires Stretchable Electrochemical Electrodes.
Anal Chem. 2018 11 20; 90(22):13498-13505.AC

Abstract

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.

Authors+Show Affiliations

Department of Chemical Engineering , Monash University , Clayton , Victoria 3800 , Australia. New Horizon Research Centre , Monash University , Clayton , Victoria 3800 , Australia.Department of Chemical Engineering , Monash University , Clayton , Victoria 3800 , Australia. New Horizon Research Centre , Monash University , Clayton , Victoria 3800 , Australia.Department of Chemical Engineering , Monash University , Clayton , Victoria 3800 , Australia. New Horizon Research Centre , Monash University , Clayton , Victoria 3800 , Australia.Department of Chemical Engineering , Monash University , Clayton , Victoria 3800 , Australia. New Horizon Research Centre , Monash University , Clayton , Victoria 3800 , Australia.Department of Chemical Engineering , Monash University , Clayton , Victoria 3800 , Australia. New Horizon Research Centre , Monash University , Clayton , Victoria 3800 , Australia.Department of Chemical Engineering , Monash University , Clayton , Victoria 3800 , Australia. New Horizon Research Centre , Monash University , Clayton , Victoria 3800 , Australia.Department of Nanoengineering , University of California, San Diego , La Jolla , California 92093 , United States.New Horizon Research Centre , Monash University , Clayton , Victoria 3800 , Australia. Department of Materials Science and Engineering , Monash University , Clayton , Victoria 3800 , Australia.Department of Chemical Engineering , Monash University , Clayton , Victoria 3800 , Australia. New Horizon Research Centre , Monash University , Clayton , Victoria 3800 , Australia. The Melbourne Centre for Nanofabrication , Clayton , Victoria 3800 , Australia.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

30350612

Citation

Zhai, Qingfeng, et al. "Vertical Gold Nanowires Stretchable Electrochemical Electrodes." Analytical Chemistry, vol. 90, no. 22, 2018, pp. 13498-13505.
Zhai Q, Wang Y, Gong S, et al. Vertical Gold Nanowires Stretchable Electrochemical Electrodes. Anal Chem. 2018;90(22):13498-13505.
Zhai, Q., Wang, Y., Gong, S., Ling, Y., Yap, L. W., Liu, Y., Wang, J., Simon, G. P., & Cheng, W. (2018). Vertical Gold Nanowires Stretchable Electrochemical Electrodes. Analytical Chemistry, 90(22), 13498-13505. https://doi.org/10.1021/acs.analchem.8b03423
Zhai Q, et al. Vertical Gold Nanowires Stretchable Electrochemical Electrodes. Anal Chem. 2018 11 20;90(22):13498-13505. PubMed PMID: 30350612.
* Article titles in AMA citation format should be in sentence-case
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, Y1 - 2018/11/05/ PY - 2018/10/24/pubmed PY - 2019/5/23/medline PY - 2018/10/24/entrez SP - 13498 EP - 13505 JF - Analytical chemistry JO - Anal. Chem. VL - 90 IS - 22 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. SN - 1520-6882 UR - https://www.unboundmedicine.com/medline/citation/30350612/Vertical_Gold_Nanowires_Stretchable_Electrochemical_Electrodes_ L2 - https://dx.doi.org/10.1021/acs.analchem.8b03423 DB - PRIME DP - Unbound Medicine ER -