A Facile One‐step Method to Produce Graphene–CdS Quantum Dot Nanocomposites as Promising Optoelectronic Materials

Cao, Aoneng; Liu, Zhen; Chu, Shijin; Wu, Minghong; Ye, Zhangmei; Cai, Zhengwei; Chang, Ya-Wen; Wang, Shufeng; Gong, Qihuang; Liu, Yuanfang

doi:10.1002/adma.200901920

Cited by 675 publications

(473 citation statements)

References 26 publications

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“…The reduction of GO during the reaction is also confirmed by the blue shift of the G-band (Fig. S-8, in the ESM) in the Raman spectra [15].…”

Section: Introductionmentioning

confidence: 79%

“…However, to date there have been few demonstrations of the synthesis of GNs-semiconductor QD nanocomposites with a high degree of dispersion [14,15]. The main hurdle in the synthesis of semiconductor QDs on the surface of GNs is that introducing the metal ions into an aqueous solution of GNs causes their immediate aggregation.…”

Section: Introductionmentioning

confidence: 99%

“…S-7, in the ESM). Comparison of the FTIR spectra of different samples shows that the band at 1055 cm -1 (C-O stretching vibration) of GO is decreased for GNs, GNs-CdS, and GNs-ZnS, which indicates significant chemical reduction of this group [15]. In addition, the characteristic absorption peak at ~1724 cm -1 (C=O stretching vibration), and the vibration and deformation peaks of O-H groups at ~3378 cm -1 and ~1410 cm -1 in the spectra of GNs, GNs-CdS, and GNs-ZnS demonstrate the presence of the bonded PAA.…”

Section: Introductionmentioning

confidence: 99%

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One-step, solvothermal synthesis of graphene-CdS and graphene-ZnS quantum dot nanocomposites and their interesting photovoltaic properties

et al. 2010

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The synthesis of graphene-semiconductor nanocomposites has attracted increasing attention due to their interesting optoelectronic properties. However the synthesis of such nanocomposites, with decorated particles well dispersed on graphene, is still a great challenge. This work reports a facile, one-step, solvothermal method for the synthesis of graphene-CdS and graphene-ZnS quantum dot nanocomposites directly from graphene oxide, with CdS and ZnS very well dispersed on the graphene nanosheets. Photoluminescence measurements showed that the integration of CdS and ZnS with graphene significantly decreases their photoluminescence. Transient photovoltage studies revealed that the graphene-CdS nanocomposite exhibits a very unexpected strong positive photovoltaic response, while separate samples of graphene and CdS quantum dots (QDs) of a similar size do not show any photovoltaic response.

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“…The reduction of GO during the reaction is also confirmed by the blue shift of the G-band (Fig. S-8, in the ESM) in the Raman spectra [15].…”

Section: Introductionmentioning

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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One-step, solvothermal synthesis of graphene-CdS and graphene-ZnS quantum dot nanocomposites and their interesting photovoltaic properties

et al. 2010

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“…21,22,[26][27][28][29] Recently, experimental research on graphene has been extended to the fabrication and study of QD-graphene nanostructures. [30][31][32][33][34] For example, a CdS QD-graphene hybrid system has been synthesized by Cao et al, 30 in which a picosecond ultrafast electron transfer process from the excited QD to the graphene matrix was observed using time-resolved fluorescence spectroscopy. Chen et al 31 have fabricated CdSe/ZnS QDs in contact with single-and few-layer graphene sheets.…”

Section: Introductionmentioning

confidence: 99%

Dipole-dipole interaction between a quantum dot and a graphene nanodisk

et al. 2012

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We study theoretically the dipole-dipole interaction and energy transfer in a hybrid system consisting of a quantum dot and graphene nanodisk embedded in a nonlinear photonic crystal. In our model, a probe laser field is applied to measure the energy transfer between the quantum dot and graphene nanodisk, while a control field manipulates the energy transfer process. These fields create excitons in the quantum dot and surface plasmon polaritons in the graphene nanodisk which interact via the dipole-dipole interaction. Here, the nonlinear photonic crystal acts as a tunable photonic reservoir for the quantum dot, and is used to control the energy transfer. We have found that the spectrum of power absorption in the quantum dot has two peaks due to the creation of two dressed excitons in the presence of the dipole-dipole interaction. The energy transfer rate spectrum of the graphene nanodisk also has two peaks due to the absorption of these two dressed excitons. Additionally, energy transfer between the quantum dot and the graphene nanodisk can be switched on and off by applying a pump laser to the photonic crystal or by adjusting the strength of the dipole-dipole interaction. We show that the intensity and frequencies of the peaks in the energy transfer rate spectra can be modified by changing the number of graphene monolayers in the nanodisk or the separation between the quantum dot and graphene. Our results agree with existing experiments on a qualitative basis. The principle of our system can be employed to fabricate nanobiosensors, optical nanoswitches, and energy transfer devices.

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“…The achieved 3D GN/CoAl‐NS showed comparable or much superior performance and long‐term stability for oxygen evolution reaction (OER) in alkaline medium in comparison with most previously reported LDH‐based OER electrocatalysts. This method was also extended to produce CMG‐based hybrid structures in combination with other metal NPs,119, 120 metal oxide/hydroxide NPs,121, 122, 123 and QDs 124, 125…”

Section: Self‐assembled Graphene‐based Hybrid Structuresmentioning

confidence: 99%

Self‐Assembled Graphene‐Based Architectures and Their Applications

Yuan

Xiao

et al. 2017

Advanced Science

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Due to unique planar structures and remarkable thermal, electronic, and mechanical properties, chemically modified graphenes (CMGs) such as graphene oxides, reduced graphene oxides, and the related derivatives are recognized as the attractive building blocks for “bottom‐up” nanotechnology, while self‐assembly of CMGs has emerged as one of the most promising approaches to construct advanced functional materials/systems based on graphene. By virtue of a variety of noncovalent forces like hydrogen bonding, van der Waals interaction, metal‐to‐ligand bonds, electrostatic attraction, hydrophobic–hydrophilic interactions, and π–π interactions, the CMGs bearing various functional groups are highly desirable for the assemblies with themselves and a variety of organic and/or inorganic species which can yield various hierarchical nanostructures and macroscopic composites endowed with unique structures, properties, and functions for widespread technological applications such as electronics, optoelectronics, electrocatalysis/photocatalysis, environment, and energy storage and conversion. In this review, significant recent advances concerning the self‐assembly of CMGs are summarized, and the broad applications of self‐assembled graphene‐based materials as well as some future opportunities and challenges in this vibrant area are elucidated.

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A Facile One‐step Method to Produce Graphene–CdS Quantum Dot Nanocomposites as Promising Optoelectronic Materials

Cited by 675 publications

References 26 publications

One-step, solvothermal synthesis of graphene-CdS and graphene-ZnS quantum dot nanocomposites and their interesting photovoltaic properties

One-step, solvothermal synthesis of graphene-CdS and graphene-ZnS quantum dot nanocomposites and their interesting photovoltaic properties

Dipole-dipole interaction between a quantum dot and a graphene nanodisk

Self‐Assembled Graphene‐Based Architectures and Their Applications

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