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Researchers create device that generates electricity from shadows

The team at NUS developed the SEG that harvests energy by playing on the contrast between shadow and light.

Environmental-sciences , Andrew-wee ,

S'pore house erects giant God of Wealth statue so all neighbors can prosper

A Singaporean house has erected a giant Cai Shen Ye statue in time for the Lunar New Year.

China , Kranji , Singapore-general- , Singapore , Cai-shen , Guizhou , Chinese , Lunar-new , Chinese-god , Andrew-wee , Shin-min-daily-news

Manipulating quinary charge states in solitary defects of 2D intermetallic semiconductor

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IMAGE: (a) Typical STM image of Sn2Bi with two defects: A1 and A2. (b) Differential conductance maps of A1 and A2 taken at -0.75 V. (c) Top view (up) and side...
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Credit: @Science China Press
Single atomic defect is the smallest structural unit of solid material. The construction of devices based on single defect can reach the limit of miniaturization of semiconductor devices. In the past decades, the creation and manipulation of single defects in semiconductors opened a new research field, and could be used to physically realize "qubits" of solid-state quantum computation through spin or electron charge. Most interest have focused on the studies of spin quantum computing. However, the spin manipulation need an optical and magnetic field. On the contrary, multiple charge states can be written and read using only an electric field, which will result in a more compact device size and compatibility with modern electronic technology. A successful charging in single atomic defect needs to overcome Coulomb repulsion energy. The successive multiple charging processes would increase the charging energy quadratically, which easily exceeds the band gap, leading to charging failure. Previous works only observed one or two charging processes.

Peng-cheng , Sichuan , China , Jian-gou , Anhui , Yong-xu , Heilongjiang , Chinese , Kehui-wu , Wenhui-duan , Bingyu-xia , Xuguang-wang