کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9789728 | 1512915 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Transition from zero-dimensional to one-dimensional behavior in InAs and CdSe nanorods
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
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چکیده انگلیسی
Tunneling and optical spectroscopy performed on InAs nanorods 7-25Â nm long, reveal a clear dependence of the band gap on length. This (zero-dimension like) behavior is different from that of CdSe rods, where the band gap is nearly independent of length, a signature of quasi-one-dimensionality. The transition between these two regimes is governed by the ratio between the Bohr radius and the nanorods length. The gaps measured by tunneling spectroscopy are larger than the optical gaps by a factor that depends on the tunneling configuration. This is attributed to a combination of the Coulomb interaction and the voltage division between the two tunnel junctions in the STM experiment. However, the tunneling gaps were found to reduce in dense aggregates of rods.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica E: Low-dimensional Systems and Nanostructures - Volume 26, Issues 1â4, February 2005, Pages 1-8
Journal: Physica E: Low-dimensional Systems and Nanostructures - Volume 26, Issues 1â4, February 2005, Pages 1-8
نویسندگان
Oded Millo, Dov Steiner, David Katz, Assaf Aharoni, ShiHai Kan, Taleb Mokari, Uri Banin,