在单个分子水平上对TATP爆炸物的道结点传感
Aleksandar Ž Tomović1, Helena Miljkovic1, Miloš S Dražić1
1University of Belgrade, Institute for Multidisciplinary Research, Kneza Višeslava 1, 11030 Belgrade, Serbia. radomir.zikic@sanu.ac.rs.
Physical chemistry chemical physics : PCCP
|September 29, 2023
概括
我们开发了一种使用单分子传感检测三三氧化物 (TATP) 爆炸物的新方法. 这种方法测量了碳纳米管纳米间隙中的道电流,用于高度敏感和便携式爆炸物检测.
科学领域:
- 材料科学 材料科学 材料科学
- 化学 化学 化学
- 物理 物理学 物理
背景情况:
- 三三氧化 (TATP) 是一种危险的自制炸药,经常用于恐怖主义活动.
- 目前的TATP检测方法面临着由于该化合物的挥发性和缺乏便携式传感技术的挑战.
研究的目的:
- 提出并从理论上研究一种用于环境空气中单分子TATP检测的新方法.
- 为了证明使用纳米间隙中的道电流测量用于敏感爆炸物检测的可行性.
主要方法:
- 使用密度函数理论 (DFT) 与非平衡格林函数 (NEGF) 方法相结合.
- 模拟通过被困在末碳纳米管纳米间隙中的TATP分子穿过道电流.
- 分析了TATP-nanogap系统的电子结构和电荷传输特性.
主要成果:
- 通过纳米间隙中的单个TATP分子计算了显著的道电流 (几十个纳米安培) .
- 对常见的挥发性有机化合物 (VOC) 实现了高的歧视比率 (数个数量级).
- 确定了TATP最高占成分子轨道 (HOMO),电极电场和分子杂交在促进电流中的关键作用.
结论:
- 拟议的方法为高度敏感和选择性的单分子TATP检测提供了一个有希望的途径.
- 这些发现表明,有可能开发便携式和有效的爆炸物检测装置.
- 该原理可以扩展到其他纳米间隙系统,如石墨烯纳米间隙和断裂连接.
相关概念视频
Enzyme-linked Receptors
Enzyme-linked receptors are proteins that act as both receptor and enzyme, activating multiple intracellular signals. This is a large group of receptors that include the receptor tyrosine kinase (RTK) family. Many growth factors and hormones bind to and activate the RTKs.
Neurotrophin (NT) receptors are a family of RTKs, including trkA, trkB, and trkC (tropomyosin-related kinase) receptors. TrkA is specific for nerve growth factor (NGF), neurotrophin-6, and neurotrophin-7. TrkB binds...
Neurotrophin (NT) receptors are a family of RTKs, including trkA, trkB, and trkC (tropomyosin-related kinase) receptors. TrkA is specific for nerve growth factor (NGF), neurotrophin-6, and neurotrophin-7. TrkB binds...
ATP Synthase: Mechanism
In animals, the mitochondrial F1F0 ATP synthase is the key protein that synthesizes ATP molecules through a complex catalytic mechanism. While the nuclear genome encodes the majority of ATP synthase subunits, the mitochondrial genome encodes some of the enzyme's most critical components. The formation of this multi-subunit enzyme is a complex multi-step process regulated at the level of transcription, translation, and assembly. Defects in one or more of these steps can result in decreased ATP...
ATP Synthase: Structure
ATP synthase or ATPase is among the most conserved proteins found in bacteria, mammals, and plants. This enzyme can catalyze a forward reaction in response to the electrochemical gradient, producing ATP from ADP and inorganic phosphate. ATP synthase can also work in a reverse direction by hydrolyzing ATP and generating an electrochemical gradient. Different forms of ATP synthases have evolved special features to meet the specific demands of the cell. Based on their specific feature, ATP...
PCR - Polymerase Chain Reaction
Overview
Peptide Identification Using Tandem Mass Spectrometry
Tandem mass spectrometry, also known as MS/MS or MS2, is an analytical technique that employs two mass analyzers. Essentially it is a series of mass spectrometers that helps isolate a particular biomolecule and then helps study its chemical properties.
This technique helps gather information regarding the protein from which the peptide was obtained and to study the peptides’ amino acid sequence. Identifying peptides from a complex mixture is an important component of the growing field of...
This technique helps gather information regarding the protein from which the peptide was obtained and to study the peptides’ amino acid sequence. Identifying peptides from a complex mixture is an important component of the growing field of...
Tandem Mass Spectrometry
Tandem mass spectrometry is a technique that uses multiple mass analyzers in series to obtain a higher selectivity and reduce chemical noise during analyte detection. Instruments with multiple analyzers separated by an interaction cell enable secondary fragmentation and selected study of the fragment ions.Secondary fragmentations occur in the interaction cell and can be induced by various factors. Fragmentation induced by collision with inert gases, such as N2, Ar, He, etc., is called...


