Ultra-sensitive benzene detection by a novel approach: Core-shell nanowires combined with the Pd-functionalization

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• 作者：Jae-Hun Kim^aAuthor Vitae ; Hyoun Woo Kim^b ; ^c ; ^{hyounwoo@hanyang.ac.kr" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Sang Sub Kim^a ; ^{sangsub@inha.ac.kr" class="auth_mail" title="E-mail the corresponding author}Author Vitae
• 关键词：SnO2-ZnO ; Core-shell nanowire ; Pd-Functionalization ; Benzene (C6H6) ; Gas sensor
• 刊名：Sensors & Actuators: B. Chemical
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：239
• 期：Complete
• 页码：578-585
• 全文大小：2597 K

文摘

We have realized an excellent selective sensing to benzene (C₆H₆) by means of using SnO₂-ZnO core-shell nanowires functionalized with Pd nanoparticles. We obtained a response of 71 for 100 ppb of C₆H₆, which is the highest response reported thus far. The synergistic effects of variation of SnO₂/ZnO potential barriers and chemical sensitization of Pd are responsible for the highest C₆H₆-sensing performance. These results highlight the potential for using Pd functionalized nanowires as a sensing platform in detecting trace concentrations of benzene, which is applicable in the future sensor, including the disease diagnosis and the environmental monitoring.