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DOI | 10.1073/pnas.1900205116 |
Flame-formed carbon nanoparticles exhibit quantum dot behaviors | |
Liu, Changran1; 39;Anna, Andrea2 | |
2019 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
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ISSN | 0027-8424 |
出版年 | 2019 |
卷号 | 116期号:26页码:12692-12697 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Italy; India; Peoples R China |
英文摘要 | We examine the quantum confinement in the photoemission ionization energy in air and optical band gap of carbon nanoparticles (CNPs). Premixed, stretched-stabilized ethylene flames are used to generate the CNPs reproducibly over the range of 4-23 nm in volume median diameter. The results reveal that flame-formed CNPs behave like an indirect band gap material, and that the existence of the optical band gap is attributed to the highest occupied molecular orbital (HOMO)-lowest unoccupied molecular orbital (LUMO) gap in the polycyclic aromatic hydrocarbons comprising the CNPs. Both the ionization energy and optical band gap are found to follow closely the quantum confinement effect. The optical band gaps, measured both in situ and ex situ on the CNPs prepared in several additional flames, are consistent with the theory and the baseline data of CNPs from stretched-stabilized ethylene flames, thus indicating the observed effect to be general and that the particle size is the single most important factor governing the variation of the band gap of the CNPs studied. Cyclic voltammetry measurements and density functional theory calculations provide additional support for the quantum dot behavior observed. |
英文关键词 | carbon nanoparticles quantum dots flames |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000472719100027 |
WOS关键词 | POLYCYCLIC AROMATIC-HYDROCARBONS ; NASCENT SOOT PARTICLES ; ELECTRONIC-STRUCTURE ; OPTICAL-PROPERTIES ; INFRARED-EMISSION ; SIZE ; ENERGY ; PAH ; CLUSTERS ; BANDS |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/205132 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Stanford Univ, Dept Mech Engn, Stanford, CA 94305 USA; 2.Univ Napoli Federico II, Dipartimento Ingn Chim Mat & Prod Ind, I-80125 Naples, Italy; 3.Ist Ric Combust CNR, I-80125 Naples, Italy; 4.Indian Inst Technol, Dept Aerosp Engn, Kanpur 208016, UP, India; 5.Tsinghua Univ, Dept Energy & Power Engn, Ctr Combust Energy, Beijing 100084, Peoples R China; 6.Beijing Inst Technol, Sch Mechatron Engn, State Key Lab Explos Sci & Technol, Beijing 100081, Peoples R China |
推荐引用方式 GB/T 7714 | Liu, Changran,39;Anna, Andrea. Flame-formed carbon nanoparticles exhibit quantum dot behaviors[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2019,116(26):12692-12697. |
APA | Liu, Changran,&39;Anna, Andrea.(2019).Flame-formed carbon nanoparticles exhibit quantum dot behaviors.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,116(26),12692-12697. |
MLA | Liu, Changran,et al."Flame-formed carbon nanoparticles exhibit quantum dot behaviors".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 116.26(2019):12692-12697. |
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