Head of Nanotechnology Research Center, Military Technical College, Kobry El-Kobba, Cairo, Egypt.
Head of Department of Biomedical Engineering, Military Technical Collage, Kobry Elkoba, Cairo, Egypt.
Talanta. 2020 May 1;211:120695. doi: 10.1016/j.talanta.2019.120695. Epub 2019 Dec 27.
Terrorism by means of explosives has become a crucial threat. Nanoparticles with distinctive properties can offer novel aspects for instant detection of explosive materials. Common explosives are organic compounds that contain nitro group (NO) along with carbon and hydrogen elements. This study demonstrates complete identification of nitramine explosives (RDX & HMX) using colloidal silica nanoparticles. Sustainable fabrication of colloidal silica was conducted via hydrothermal processing technique. Explosive identification involves a digestion of the tested material using strong acid. The digestion process results in the development of nitro group and corresponding formaldehyde segment. The identification of the nitro group was performed using colloidal silica nanoparticles functionalized with secondary amine to develop a characteristic dark blue colour. Simultaneous identification of formaldehyde segment was performed using colloidal silica functionalized with aromatic phenol to develop a red colour. This robust explosive detection technology can find wide applications on site where instant identification to assess potential threat is a crucial demand. Thanks to hydrothermal processing, sustainable fabrication and surface modification of colloidal silica particles can be obtained.
爆炸物恐怖主义已成为一个关键威胁。具有独特性能的纳米粒子可以为爆炸物材料的即时检测提供新的方面。常见的爆炸物是含有硝基（NO）以及碳和氢元素的有机化合物。本研究使用胶体硅纳米粒子对硝胺炸药（RDX 和 HMX）进行了完全鉴定。通过水热加工技术可持续地制造胶体硅。爆炸物鉴定涉及使用强酸对测试材料进行消解。消解过程会产生硝基和相应的甲醛片段。使用带有仲胺官能化的胶体硅纳米粒子鉴定硝基，会产生特征性的深蓝色。同时，使用带有芳基苯酚官能化的胶体硅鉴定甲醛片段，会产生红色。这种强大的爆炸物检测技术可以在现场得到广泛应用，在现场，即时鉴定以评估潜在威胁是至关重要的需求。得益于水热加工，可以获得胶体硅颗粒的可持续制造和表面改性。
