期刊
JOURNAL OF MATERIALS CHEMISTRY
卷 22, 期 35, 页码 18156-18163出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2jm33742h
关键词
-
资金
- National Natural Science Foundation of China [21107013, 21171035, 41073060, 50902021, 50925312]
- Specialized Research Fund for the Doctoral Program of Higher Education [20090075120014, 20110075120012]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars
- Science and Technology Commission of Shanghai-based Innovation Action Plan'' Project [10JC1400100]
- Shanghai Rising-Star Program [11QA1400100]
- Shanghai Leading Academic Discipline Project [B603]
- Fundamental Research Funds for the Central Universities
- Program of Introducing Talents of Discipline to Universities [111-2-04]
Wireless nanobiodevices (such as nanorobots) have great potential to revolutionize the diagnosis and therapeutic system for human health, but their applications have been limited by difficulties in fabricating such nanobiodevices, and one of the difficulties is to obtain an in vivo energy source as their biopower component. To address this problem, we have developed a kind of 980 nm laser-driven photovoltaic cell (980LD-PVC) by introducing a NaYF4:Yb, Er nanophosphor layer in conventional dye-sensitized solar cells, and its performance has been optimized by improving the up-conversion luminescence intensity of NaYF4:Yb, Er nanophosphors and adopting a succinonitrile-based gel electrolyte. Under the direct irradiation of a 980 nm laser with an illumination area of 2 x 8 mm(2) and a safe intensity of 720 mW cm(-2) that is slightly lower than the conservative limit (726 mW cm(-2)) for human skin exposure, 980LD-PVC without a liquid component exhibits a maximum output power of 44.5 mu W and an overall 980 nm laser-to-electrical energy conversion efficiency of 0.039%. In particular, after being covered with chicken skin (thickness: 1 mm) as a model of biological tissue, 980LD-PVC still possesses a maximum output power of 22.2 mu W and an overall conversion efficiency of 0.019%, which is still excellent enough to satisfy the power requirements of in vivo nanorobots (at least 1 mu W) and cardiac pacemakers (about 10 mu W). This research paves the way for the development of novel electrical sources to power wireless nanobiodevices and many other biodevices implanted under the human skin.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据