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【請教】請問,如何測量納米粒子的帶隙
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請問,如何測量納米粒子的帶隙?好像用紫外-可見分光光度計可以,但是查了相關的書卻沒有說明。還有什么辦法嗎? 謝謝大家! |
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» 搶金幣啦!回帖就可以得到:
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The relationship between the absorption coefficient ( ) and the photon energy ( ) can be written as shown in Eq. (1) [22]: (1) Where B is the constant related to the effective masses associated with the valence and conduction bands, Eg is the band gap energy, E= is the photon energy, respectively. Fig. 4a shows the absorption spectrum of the as-synthesized TiO2 beads (sample S4). The inset shows the plots of ( )2 versus the ( ). Eg for the as-synthesized TiO2 beads can be calculated by extrapolating the linear portion of ( )2 versus the ( ) plot to =0. |
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DRS光譜 [ Last edited by charley86577 on 2010-11-24 at 21:26 ] |
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