Ultra-narrow bandwidth red-emission carbon quantum dots and their bio-imaging

IF 2.9 3区物理与天体物理 Q3 NANOSCIENCE & NANOTECHNOLOGY

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2022-08-01 DOI:10.1016/j.physe.2022.115197

Peiguang Shi , Yuming Song , Ju Tang , Zhifeng Nie , Jiawei Chang , Qiuyuan Chen , Yunfei He , Tingting Guo , Jin Zhang , Hai Wang

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引用次数: 2

Abstract

One-step solvothermal method was used to synthesize red fluorescent carbon quantum dots (R-CQDs) with ultra-narrow bandwidth emission by using the titanyl-phthalocyanine (TiOPc) as the reaction precursor and ethanol as the organic solvent. We characterized the structural and optical properties of the R-CQDs by a variety of spectroscopic methods such as photoluminescence. Our studies have shown that the photoluminescence properties of R-CQDs are independent of the excitation wavelength. The strongest emission peak is at 674 nm, the full width at half maximum (FWHM) is only 23.2 nm, and the quantum yield (QY) is 7.54%. In addition, we also studied the application of the R-CQDs as a potential diagnostic marker. It was observed that the R-CQDs could enter the aloe tissue. The R- CQDs reported here have a narrow width and excellent QY characteristics, which can be attributed to the surface and edge C = O, C = N groups and Ti doping in the R-CQDs. Such R-CQDs can be widely used in the fields of display device, cell labelling and bio-imaging.

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超窄带宽红发射碳量子点及其生物成像

采用一步溶剂热法，以酞菁钛(TiOPc)为前驱体，乙醇为有机溶剂，合成了超窄带宽发射的红色荧光碳量子点(R-CQDs)。我们用光致发光等多种光谱方法表征了R-CQDs的结构和光学性质。我们的研究表明，R-CQDs的光致发光特性与激发波长无关。最强发射峰在674 nm处，半峰全宽(FWHM)仅为23.2 nm，量子产率(QY)为7.54%。此外，我们还研究了R-CQDs作为潜在诊断标记物的应用。观察到R-CQDs可以进入芦荟组织。本文报道的R-CQDs具有窄宽度和良好的QY特性，这可归因于R-CQDs中表面和边缘的C = O, C = N基团和Ti掺杂。这种R-CQDs可广泛应用于显示器件、细胞标记和生物成像等领域。

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来源期刊

Physica E-low-dimensional Systems & Nanostructures 物理-纳米科技

CiteScore

7.30

自引率

6.10%

发文量

356

审稿时长

65 days

期刊介绍： Physica E: Low-dimensional systems and nanostructures contains papers and invited review articles on the fundamental and applied aspects of physics in low-dimensional electron systems, in semiconductor heterostructures, oxide interfaces, quantum wells and superlattices, quantum wires and dots, novel quantum states of matter such as topological insulators, and Weyl semimetals. Both theoretical and experimental contributions are invited. Topics suitable for publication in this journal include spin related phenomena, optical and transport properties, many-body effects, integer and fractional quantum Hall effects, quantum spin Hall effect, single electron effects and devices, Majorana fermions, and other novel phenomena. Keywords: • topological insulators/superconductors, majorana fermions, Wyel semimetals; • quantum and neuromorphic computing/quantum information physics and devices based on low dimensional systems; • layered superconductivity, low dimensional systems with superconducting proximity effect; • 2D materials such as transition metal dichalcogenides; • oxide heterostructures including ZnO, SrTiO3 etc; • carbon nanostructures (graphene, carbon nanotubes, diamond NV center, etc.) • quantum wells and superlattices; • quantum Hall effect, quantum spin Hall effect, quantum anomalous Hall effect; • optical- and phonons-related phenomena; • magnetic-semiconductor structures; • charge/spin-, magnon-, skyrmion-, Cooper pair- and majorana fermion- transport and tunneling; • ultra-fast nonlinear optical phenomena; • novel devices and applications (such as high performance sensor, solar cell, etc); • novel growth and fabrication techniques for nanostructures