کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10633702 993050 2005 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Colloidal suspensions of silicon nanocrystals: from single nanocrystals to photonic structures
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Colloidal suspensions of silicon nanocrystals: from single nanocrystals to photonic structures
چکیده انگلیسی
Colloidal suspesions of Si nanocrystals (NCs) are prepared from light-emitting porous Si grains obtained by mechanical pulverization of electrochemically etched layers. Sedimented and/or filtered Si NCs sols reveal a green photoluminescence (PL) band around 530 nm, which is interpreted as radiative recombination of electron-hole pairs inside Si NCs with diameter about 2 nm. These colloidal solutions have multiple advantages for both fundamental investigations and for nanotechnology. In one extreme, single molecule spectroscopy techniques can be applied to investigate PL of single grains of Si NCs dispersed on substrates from highly diluted solutions. On the other hand, concentrated suspensions enable us to fabricate bulk samples with embedded Si NCs or to prepare self-organised nanostructures on surfaces.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optical Materials - Volume 27, Issue 5, February 2005, Pages 1046-1049
نویسندگان
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