2015
DOI: 10.1016/j.apsusc.2014.11.061
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DFT study of adsorption of picric acid molecule on the surface of single-walled ZnO nanotube; as potential new chemical sensor

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Cited by 21 publications
(14 citation statements)
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“…On the basis of Frontier molecular orbital studies, it has been shown that the adsorption of the picric acid molecules on the surface of ZnO lowers the energy gap between the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO), resulting in the alteration of the electronic states and hence the charge transfer and conductance of the ZnO nanomaterials, as stated earlier in Section 3.1 [ 14 , 45 ]. Picric acid molecules with electron donor hydroxy (–OH) and electron withdrawing nitro (–NO 2 ) groups are adsorbed on the surface of the ZnO nanopeanuts through weak van der Waal interactions, where they undergo a series of redox changes [ 14 ]. Conduction band electrons of the ZnO nanopeanuts reduce the three –NO 2 groups to intermediate hydroxylamino (–HN–OH) groups, which are subsequently oxidized to nitroso (–NO) groups ( Figure 9 ).…”
Section: Proposed Sensing Mechanismmentioning
confidence: 99%
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“…On the basis of Frontier molecular orbital studies, it has been shown that the adsorption of the picric acid molecules on the surface of ZnO lowers the energy gap between the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO), resulting in the alteration of the electronic states and hence the charge transfer and conductance of the ZnO nanomaterials, as stated earlier in Section 3.1 [ 14 , 45 ]. Picric acid molecules with electron donor hydroxy (–OH) and electron withdrawing nitro (–NO 2 ) groups are adsorbed on the surface of the ZnO nanopeanuts through weak van der Waal interactions, where they undergo a series of redox changes [ 14 ]. Conduction band electrons of the ZnO nanopeanuts reduce the three –NO 2 groups to intermediate hydroxylamino (–HN–OH) groups, which are subsequently oxidized to nitroso (–NO) groups ( Figure 9 ).…”
Section: Proposed Sensing Mechanismmentioning
confidence: 99%
“…Among the various metal oxide nanomaterials, the ZnO–II-VI semiconductor, with a low band gap energy of 3.37 eV and a large exciton binding energy of 60 MeV, is extensively studied [ 5 ]. Due to its tetrahedral structure and polar symmetry along the hexagonal axis of the wurtzite phase, ZnO with a variety of morphologies having high surface defect density can be synthesized [ 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 ]. These morphologies provide a large surface area for the adsorption of chemical species, which is a key factor for efficient electrochemical sensor applications [ 11 , 15 ].…”
Section: Introductionmentioning
confidence: 99%
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“…Polymeric materials can be used as sensitive material for the detection of VOCs because of their ability to absorption and desorption of different VOCs (1,2). For the purpose of sensing gas molecules, the thin film must be functionalized with a gas sensitive layer.…”
Section: Introductionmentioning
confidence: 99%
“…These aromatic nitro derivatives of phenol are listed as highly toxic and poisonous materials by environmental protection agency [130]. Among these materials, Picric Acid is considered to be the most toxic for liver, kidney, eyes, respiratory track etc [131,132].With the fast developments in the field of nanotechnology in the past decade, nanomaterial-based electrochemical sensors are considered to be potential candidates owing to their high sensitivity and selectivity, wide linear dynamic range, very low limit of detection, cost effectiveness, fast response, and easy fabrication [133,134].…”
Section: Introductionmentioning
confidence: 99%