Super-hydrophobic 鈥渟mart鈥?sand for buried explosive detection

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• 作者：Xiangcheng Sun^aAuthor Vitae ; Yixin Liu^aAuthor Vitae ; Srilaya Mopidevi^bAuthor Vitae ; Yongtao Meng^cAuthor Vitae ; Fei Huang^aAuthor Vitae ; Joseph Parisi^aAuthor Vitae ; Mu-Ping Nieh^a ; ^dAuthor Vitae ; Chris Cornelius^eAuthor Vitae ; Steven L. Suib^a ; ^c ; ^dAuthor Vitae ; Yu Lei^a ; ^{ylei@engr.uconn.edu" class="auth_mail}Author Vitae
• 关键词：&ldquo ; Smart&rdquo ; sand ; Fluorescence ; Quenching ; Buried explosive ; Sensing ; Pyrene ; Polystrene
• 刊名：Sensors and Actuators B: Chemical
• 出版年：May, 2014
• 年：2014
• 卷：195
• 期：Complete
• 页码：52-57
• 全文大小：1806 K

文摘

Explosive-sensitive fluorescent sand (鈥渟mart鈥?sand) was prepared through the simple coating of polystyrene/pyrene/TBAHP composite on normal sand. The as-prepared 鈥渟mart鈥?sand was characterized using SEM, EDS, XRD, FT-IR, Raman, and UV-Vis. Further analysis of contact angle and fluorescence emission spectra confirm that the explosive-sensitive fluorescent composite film coats on the surface of the sand, endowing 鈥渟mart鈥?sand both strong fluorescence and super-hydrophobicity, which provides an excellent sensing material for buried nitroaromatic explosive sensing, presumably due to its strong affinity with nitroaromatic explosive vapor. The detection of buried explosives in soil was achieved and validated through quenched spots on a thin layer of 鈥渟mart鈥?sand paved on the top of soil. The quenched area and decreased intensity vary with the amounts and depths of 2,4-DNT buried in soils. Such detection can be performed using a handheld UV lamp and observed by naked eyes, thus providing great potential and advantage for large-scale landmine detection and mapping.