研究了不同壳层厚度(0～5.5ML)的CdSe/CdS核壳量子点的一次和高次拉曼散射,具体分析了CdSe和CdS的表面模随着壳层厚度的变化情况.结果表明,随着壳层厚度的增加,CdSe表面模(SO1)从198cm-1频移到185cm-1,CdS的表面模(SO2)从275cm-1频移到267cm-1,并且SO1和SO2试验结果与由介电连续模型得到的理论值很接近.此外,根据CdSe表面模的频移,对随着CdS壳层厚度的增加而引起的核层(CdSe)的介电常数随环境的变化做出了修正.
参考文献
| [1] | Wang X Y;Qu L H;Zhang J Y et al.[J].Nano Letters,2003,3:1103-1106. |
| [2] | Steckel J S;Zimmer J P;Sullivan S C et al.[J].Angewandte Chemie International Edition,2004,43:2154-2158. |
| [3] | Li J J;Wang Y A;Guo W Z et al.[J].Journal of the American Chemical Society,2003,125:12567-12575. |
| [4] | Mekis I;Talapin D V;Kornowski A et al.[J].Journal of Physical Chemistry B,2003,102:7454-7462. |
| [5] | Chen X B;You Y B;Burda C .[J].Internet Journal of Nanotechnology,2004,1:105-116. |
| [6] | Azhniuk YM;Milekhin AG;Gomonnai AV;Lopushansky VV;Yukhymchuk VO;Schulze S;Zenkevich EI;Zahn DRT .Resonant Raman studies of compositional and size dispersion of CdS1-xSex nanocrystals in a glass matrix[J].Journal of Physics. Condensed Matter,2004(49):9069-9082. |
| [7] | Scamarcio G;Lugara M;Manno D .[J].Physical Review B:Condensed Matter,1992,45:13792-13795. |
| [8] | Gouadec G;Colomban P .[J].Progress in Crystal Growth and Characterization of Materials,2007,53:1-73. |
| [9] | Gomonnai AV.;Azhniuk YM.;Yukhymchuk VO.;Kranjcec M.;Lopushansky VV. .Confinement-, surface- and disorder-related effects in the resonant Raman spectra of nanometric CdS1-xSex crystals[J].Physica status solidi, B. Basic research,2003(2):490-499. |
| [10] | Champagnon B;Andrianasolo B;Dural E .[J].Journal of Chemical Physics,1991,94:5237-5239. |
| [11] | Singha A;Satpati B;Statyam P V et al.[J].Journal of Physics:Condensed Matter,2005,17:5697-5708. |
| [12] | Dzhagan V M;Valakh M Y;Raevskaye A E et al.[J].Nanotechnology,2007,18:285701-285707. |
| [13] | Dabbousi B O;Viejo J R;Mikulec F V et al.[J].Journal of Physical Chemistry B,1997,101:9463-9475. |
| [14] | Ingale A.;Rustagi KC. .Raman spectra of semiconductor nanoparticles: Disorder-activated phonons[J].Physical Review.B.Condensed Matter,1998(11):7197-7204. |
| [15] | Verma P;Gupta L;Abbi S C et al.[J].Journal of Applied Physics,2000,88:4109-4116. |
| [16] | Bischof T;Ivanda M;Lermann G et al.[J].Journal of Raman Spectroscopy,1996,27:297-302. |
| [17] | Roy A.;Sood AK. .SURFACE AND CONFINED OPTICAL PHONONS IN CDSXSE1-X NANOPARTICLES IN A GLASS MATRIX[J].Physical Review.B.Condensed Matter,1996(18):12127-12132. |
| [18] | Leng J;Qian Y;Chen P et al.[J].Solid State Communications,1989,69:311-315. |
| [19] | Brafman O;Manor R .[J].Physical Review B:Condensed Matter,1995,51:6940-6946. |
| [20] | Olego D J;Raccah P M;Faurie J P .[J].Physical Review B:Condensed Matter,1986,33:3819-3822. |
| [21] | Trallero-Giner C.;Cardona M.;Menendez-Proupin E.;Ekimov AI.;Debernardi A. .Optical vibrons in CdSe dots and dispersion relation of the bulk material[J].Physical Review.B.Condensed Matter,1998(8):4664-4669. |
| [22] | Vasilevskiy MI.;Gomes MJM.;Rolo AG. .ONE-PHONON RAMAN SCATTERING FROM ARRAYS OF SEMICONDUCTOR NANO-CRYSTALS[J].Solid State Communications,1997(7):381-386. |
| [23] | Klein M C;Haehe F;Ricard D et al.[J].Physical Review B:Condensed Matter,1990,42:11123-11132. |
| [24] | Baranov A V;Rakovich Y P;Donegan J F et al.[J].Physical Review B:Condensed Matter,2003,68:165306-1651-7. |
| [25] | Bolcatto PG.;Proetto CR. .Partially confined excitons in semiconductor nanocrystals with a finite size dielectric interface[J].Journal of Physics. Condensed Matter,2001(2):319-334. |
| [26] | Tanaka A;Onari S;Arai T .[J].Physical Review B:Condensed Matter,1992,45:6587-6592. |
| [27] | Comas F;Trallero-Giner C .[J].Physical Review B:Condensed Matter,2003,67:115301-1151-7. |
| [28] | Comas F;Trallero-Giner C;Studart N et al.[J].Physical Review B:Condensed Matter,2002,65:073303. |
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