Selective sensing of 2,4,6-trinitrotoluene and triacetone triperoxide using carbon/boron nitride heteronanotubes
Selective sensing of 2,4,6-trinitrotoluene and triacetone triperoxide using carbon/boron nitride heteronanotubes
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DOI：
10.1016/j.mtcomm.2021.102739
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发表时间：
2021-09-01
影响因子：
3.8
通讯作者：
Al-Backri, Amaal A.
中科院分区：
文献类型：
--
作者：
Algharagholy, Laith A.;Sadeghi, Hatef;Al-Backri, Amaal A.
活性化合物的检测是一个巨大的挑战。在这里，我们证明了碳(CNT)和氮化硼(BN)纳米管形成的异构管可以用来选择性地检测三硝基甲苯(TNT)和三丙酮三过氧化氢(TATP)。我们发现在碳/氮化硼(C/BN)异质管中可以产生和调谐能带。一旦TNT或TATP被物理吸附在C/BN异质管上，在异质管的能隙内就会形成新的共振。最重要的是，与TNT相关的输运共振是在费米能级以上形成的，并且是由于硝基，而TATP共振恰好在费米能级以下。因此，对于C/BN异质管器件，在TNT存在下预期为负的Seebeck系数，而在TATP存在下为正的Seebeck系数。这可以用于对这些物种的选择性传感。
The detection of reactive compounds represents a significant challenge. Here we demonstrate that heteronanotubes formed by covalently bonded carbon (CNT) and boron nitride (BN) nanotubes can be used to selectively sense trinitrotoluene (TNT) and triacetone triperoxide (TATP). We show that the energy band gap can be created and tuned in carbon/boron nitride (C/BN) heteronanotubes. Once TNT or TATP is physisorbed on C/BN heteronanotubes, new resonances are formed within the energy gap of heteronanotubes. Crucially, transport resonances associated with TNT are formed above the Fermi level and are due to nitro group whereas TATP resonances happen to be below the Fermi level. Consequently, a negative Seebeck coefficient is expected for C/ BN heteronanotubes devices in the presence of TNT in contrast to a positive Seebeck coefficient in the presence of TATP. This can be used for selective sensing of these species.