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Ramadan, A.A.,Abdel-Sattar, M.A.,Kim, Yong-Chan Korean Mathematical Society 2002 대한수학회보 Vol.39 No.4
In this paper, we study some properties of fuzzy interior spaces. Also, we investigate the relations between fuzzy interior spaces and fuzzy topological spaces. In particular, we prove the existence of product fuzzy topological spaces and product fuzzy interior spaces. We investigate the relations between them.
Tunable UV-visible absorption of SnS2layered quantum dots produced by liquid phase exfoliation
Fu, Xiao,Ilanchezhiyan, P.,Mohan Kumar, G.,Cho, Hak Dong,Zhang, Lei,Chan, A. Sattar,Lee, Dong J.,Panin, Gennady N.,Kang, Tae Won The Royal Society of Chemistry 2017 Nanoscale Vol.9 No.5
<P>4H-SnS2 layered crystals synthesized by a hydrothermal method were used to obtain via liquid phase exfoliation quantum dots (QDs), consisting of a single layer (SLQDs) or multiple layers (MLQDs). Systematic downshift of the peaks in the Raman spectra of crystals with a decrease in size was observed. The bandgap of layered QDs, estimated by UV-visible absorption spectroscopy and the tunneling current measurements using graphene probes, increases from 2.25 eV to 3.50 eV with decreasing size. 2-4 nm SLQDs, which are transparent in the visible region, show selective absorption and photosensitivity at wavelengths in the ultraviolet region of the spectrum while larger MLQDs (5-90 nm) exhibit a broad band absorption in the visible spectral region and the photoresponse under white light. The results show that the layered quantum dots obtained by liquid phase exfoliation exhibit wellcontrolled and regulated bandgap absorption in a wide tunable wavelength range. These novel layered quantum dots prepared using an inexpensive method of exfoliation and deposition from solution onto various substrates at room temperature can be used to create highly efficient visible-blind ultraviolet photodetectors and multiple bandgap solar cells.</P>