СПЕКТРОСКОПИЯ ГИГАНТСКОГО КОМБИНАЦИОННОГО РАССЕЯНИЯ КАК СРЕДСТВО ДЛЯ ОПЕРАТИВНОГО ОБНАРУЖЕНИЯ ВЗРЫВЧАТЫХ ВЕЩЕСТВ

Detection of explosives, especially on-site rapid detection of trace amount of explosives, is of great concern for homeland security and environmental issues. Surface-enhanced Raman Scattering (SERS) spectroscopy is demonstrated to enable high sensitivity to detect trace explosives levels. Herein we have assembled silver nanoparticles (AgNPs) on normal glass slides (GS) to form a novel SERS substrate. It is noteworthy that this substrate realizes the regulation of hot spots and its uniform distribution. By using this substrate, cyclotetramethylenetetranitramine (HMX) has been successfully measured to as low as 3×10 -8 M. Moreover this SERS substrate can also be employed in the detection of other explosives, such as cyclotrimethylenetrinitramine (RDX) and trinitrotoluene (TNT). The advantages including low cost, ultrahigh sensitivity, and facile manipulation of the sample preparation make the SERS spectroscopy a rapid and powerful on-site instrument in trace detection of explosives.