Linear and nonlinear optical response of g-C3N4-based quantum dots

• 作者: Jing-Zhi Zhang Hong Zhang
• 来源期刊: 中国物理B（英文版）
• 年，卷（期）: 2021,（7）
• 所属期刊栏目: CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC,AND OPTICAL PROPERTIES
• 页码范围: 641-649
• 页数: 9页
• 语种: 英文
• DOI: 10.1088/1674-1056/abec2f

摘要

Graphite carbon nitride (g-C3N4) attracts wide-ranging research interest due to its extraordinary physicochemical properties and promising applications ranging from heterogeneous catalysis to fuel cells.In this work,we design different g-C3N4-based quantum dots (gCNQDs),carry out a systematic study of optical properties,and elucidate the shape selec-tivity,composite nanostructure,and outfield effect.In particular,composites of gCNQDs and metal nanochains present excellent optical response,making it applicable to bioimaging,nano-plasma devices,and metalloenzyme in infrared light related fields.Besides,QDs which original bridging nitrogen atoms are replaced by amino (-NH2),hydroxyl (-OH),and methyl (-CH3) functional groups respectively,have excellent spectral selectivity in the deep ultraviolet region.More interestingly,in the study of the laser interaction with materials,the gCNQDs exhibit extremely high stability and light cor-rosion resistance.Phase transition from insulation to metal is observed under the critical condition of about 5 eV intensity or 337 nm wavelength.All provided theoretical support for designs and applications in g-C3N4 quantum devices.