Electrochemically Reduced Graphene Oxide on Well-Aligned Titanium Dioxide Nanotube Arrays for Betavoltaic Enhancement

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Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361005, China
Research Institute for Biomimetics and Soft Matter, Fujian Provincial Key Laboratory for Soft Functional Materials Research, Department of Physics, Xiamen University, Xiamen 361005, China
§ Department of Micro and Nano Systems Technology, Buskerud and Vestfold University College, Tønsberg N-3103, Norwayd
Cite this: ACS Appl. Mater. Interfaces 2016, 8, 37, 24638–24644
Publication Date (Web):August 30, 2016
Copyright © 2016 American Chemical Society
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We report a novel betavoltaic device with significant conversion efficiency by using electrochemically reduced graphene oxide (ERGO) on TiO2 nanotube arrays (TNTAs) for enhancing the absorption of beta radiation as well as the transportation of carriers. ERGO on TNTAs (G-TNTAs) were prepared by electrochemical anodization and subsequently cyclic voltammetry techniques. A 10 mCi of 63Ni/Ni source was assembled to G-TNTAs to form the sandwich-type betavoltaic devices (Ni/63Ni/G-TNTAs/Ti). By IV measurements, the optimum betavoltaic device exhibits a significant effective energy conversion efficiency of 26.55% with an open-circuit voltage of 2.38 V and a short-circuit current of 14.69 nAcm–2. The experimental results indicate that G-TNTAs are a high-potential nanocomposite for developing betavoltaic batteries.

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The Supporting Information is available free of charge on the ACS Publications website at DOI: 10.1021/acsami.6b08112.

  • Electrochemical synthesis of graphene films; calculation of the effective activity of the 63Ni beta source and energy conversion efficiency; photographs of measurement system, device, and typical measurement results of I–V; experimental result list of similar works for comparison (PDF)

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