尼古丁和咖啡因在单壁碳纳米管上分子吸附的第一性原理研究
Molecular adsorption study of nicotine and caffeine on the single-walled carbon nanotube from first principles
摘要:
利用第一性原理计算,我们研究了吸附在单壁碳纳米管上的尼古丁和咖啡因的电子结构和结合特性,以确定CNT是否适合用于过滤或传感尼古丁和咖啡因分子。我们发现咖啡因比尼古丁的吸附力更强。通过分析吸附分子后碳纳米管电子结构的变化,讨论了碳纳米管的不同结合特性。我们还计算了在尼古丁或咖啡因吸附物的存在下的CNT的量子电导,并证明咖啡因的影响比尼古丁对宿主CNT的电导更强。
英文摘要:
Using first-principles calculations, we investigate the electronic structures and binding properties of nicotine and caffeine adsorbed on single-walled carbon nanotubes to determine whether CNTs are appropriate for filtering or sensing nicotine and caffeine molecules. We find that caffeine adsorbs more strongly than nicotine. The different binding characteristics are discussed by analyzing the modification of the electronic structure of the molecule-adsorbed CNTs. We also calculate the quantum conductance of the CNTs in the presence of nicotine or caffeine adsorbates and demonstrate that the influence of caffeine is stronger than nicotine on the conductance of the host CNT.
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