인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록·키워드
Tetragonal graphene nano-capsule (TGC), a novel stable carbon allotrope of sp<sup>2</sup> hybridization is designed and doped with phosphorus (P) to study the O<sub>3</sub> and SO<sub>2</sub> gas sensitivity via density functional theory calculation. Real frequencies verified the natural existence of both TGC and P-doped TGC (PTGC). Both TGC and PTGC suffer structural deformations due to interaction with O<sub>3</sub> and SO<sub>2</sub> gases. The amount of charge transfer from the adsorbent to the gas molecule is significantly greater for O<sub>3</sub> adsorption than SO<sub>2</sub> adsorption. The adsorption energies for TGC + O<sub>3</sub> and PTGC + O<sub>3</sub> complexes are - 3.46 and - 4.34 eV respectively, whereas for TGC + SO<sub>2</sub> and PTGC + SO<sub>2</sub> complexes the value decreased to - 0.29 and - 0.30 eV respectively. The dissociation of O<sub>3</sub> is observed via interaction with PTGC. A significant variation in electronic energy gap and conductivity results from gas adsorption which can provide efficient electrical responses via gas adsorption. The blue/red shift in the optical response proved to be a way of detecting the types of adsorbed gases. The adsorption of O<sub>3</sub> is exothermic and spontaneous whereas the adsorption of SO<sub>2</sub> is endothermic and non-spontaneous. The negative change in entropy verifies the thermodynamic stability of all the complexes. QTAIM analysis reveals strong covalent or partial covalent interactions between absorbent and adsorbate. The significant variation in electrical and optical response with optimal adsorbent-gas interaction strength makes both TGC and PTGC promising candidates for O<sub>3</sub> and SO<sub>2</sub> sensing.
인공지능 문자 인식 모델을 통해 추출된 텍스트로, 일부 오타나 오류가 포함될 수 있으나 지속적으로 개선 중입니다.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.