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== Energy generating == Scientists from the [[National University of Singapore]] presented a shadow-effect energy generator (SEG), which consists of cells of [[gold]] deposited on a [[silicon wafer]] attached on a plastic film. The generator has a [[power density]] of 0.14 ΞΌW cm<sup>β2</sup> under indoor conditions (0.001 sun).<ref>{{cite news<!--|authors=Qian Zhang, Qijie Liang, Dilip Krishna Nandakumar, Sai Kishore Ravi, Hao Qu, Lakshmi Suresh, Xueping Zhang, Yaoxin Zhang, Lin Yang, Andrew Thye Shen Wee and Swee Ching Tan -->|author=Qian Zhang|display-authors=etal|title=Energy harvesting from shadow-effect|publisher=Energy & Environmental Science|year=2020|doi=10.1039/D0EE00825G}}</ref>
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