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ACS Appl Mater Interfaces. 2016 Sep 21;8(37):24638-44. doi: 10.1021/acsami.6b08112. Epub 2016 Sep 12.

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 , T√łnsberg N-3103, Norwayd.


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 (63)Ni/Ni source was assembled to G-TNTAs to form the sandwich-type betavoltaic devices (Ni/(63)Ni/G-TNTAs/Ti). By I-V 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.


TiO2; betavoltaic; electrochemical reduction; graphene; nanotube arrays


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