High-Yield Exfoliation of Ultrathin Two-Dimensional Ternary Chalcogenide Nanosheets for Highly Sensitive and Selective Fluorescence DNA Sensors

Tan, Chaoliang; Yu, Peng; Hu, Yanling; Chen, Junze; Huang, Ying; Cai, Yongqing; Luo, Zhimin; Li, Bing; Lu, Qipeng; Wang, Lianhui; Liu, Zheng; Zhang, Hua

doi:10.1021/jacs.5b06982

Cited by 228 publications

(166 citation statements)

References 52 publications

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“…287 Furthermore, single TMDC nanosheets exhibit different affinities for single and double-strand DNAs and efficiently quench the fluorescence of organic molecules, making them promising platforms for sensing of DNA and biomolecules. [288][289][290] Biomedical applications of TMDC nanosheets are described in details in recent reviews. 25,291 The large surface area of TMDC nanosheets render them particularly attractive for diverse energy related applications.…”

Section: Copyright (2014)mentioning

confidence: 99%

Two-Dimensional Colloidal Nanocrystals

et al. 2016

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Abstract:In this paper, we review recent progresses on colloidal growth of 2D nanocrystals.We identify four main sources of anisotropy which lead to the formation of plate-and sheetlike colloidal nanomaterials. Defect induced anisotropy is a growth method which relies on the presence of topological defects at the nanoscale to induce 2D shapes objects. Such a method is particularly important in the growth of metallic nanoobjects. Another way to induce anisotropy is based on ligand engineering. The availability of some nanocrystal facets can be tuned by selectively covering the surface with ligands of tunable thickness. Cadmium chalcogenides nanoplatelets (NPLs) strongly rely on this method which offers atomic control in the thinner direction, down to a few monolayers. 2D objects can also be obtained by post or in situ self-assembly of nanocrystals. This growth method differs from the previous ones in the sense that the elementary objects are not molecular precursors, and is a common method for lead chalcogenide compounds. Finally, anisotropy may simply rely on the lattice anisotropy itself as it is common for rod-like nanocrystals. Colloidally grown Transition Metal DiChalcogenides (TMDC) in particular result from such process. We also present hybrid syntheses which combine several of the previously described methods and other paths, such as cation exchange, which expand the range of available materials. Finally, we discuss in which sense 2D-objects differ from 0D nanocrystals and review some of their applications in optoelectronics, including lasing and photodetection, and biology.

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Section: Copyright (2014)mentioning

confidence: 99%

Two-Dimensional Colloidal Nanocrystals

et al. 2016

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“…Due to the fascinating physicochemical and electronic properties arising from the small dimensions and quantum confinement effects (QCE) [1][2][3], ultrathin nanosheets have been the focus of substantial research in the light of fundamental studies and their broad applications in various fields, including optoelectronic devices [4], energy conversion and storage [5], sensors [6][7][8][9], biomedicine [10], and catalysis [11][12][13][14][15]. In particular, polymeric graphitic carbon nitride nanosheets (GCNNs), an n-type semiconductor, have been receiving considerable attention due to their many intriguing advantages such as the fact that they contain no metal, and nontoxicity, easy availability, sensitive photo-response, excellent chemical and thermal stability, and unique electronic structures [16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Reduced-sized monolayer carbon nitride nanosheets for highly improved photoresponse for cell imaging and photocatalysis

Liang

Bai

et al. 2016

Sci. China Mater.

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Two-dimensional graphitic carbon nitride (g-C3N4) nanosheets (GCNNs) have been considered as an attractive metal-free semiconductor because of their superior catalytic, optical, and electronic properties. However, it is still challenging to prepare monolayer GCNNs with a reduced lateral size in nanoscale. Herein, a highly efficient ultrasonic technique was used to prepare nanosized monolayer graphitic carbon nitride nanosheets (NMGCNs) with a thickness of around 0.6 nm and an average lateral size of about 55 nm. With a reduced lateral size yet monolayer thickness, NMGCNs show unique photo-responsive properties as compared to both large-sized GCNNs and GCN quantum dots. A dispersion of NMGCNs in water has good stability and exhibits strong blue fluorescence with a high quantum yield of 32%, showing good biocompatibility for cell imaging. Besides, compared to the multilayer GCNNs, NMGCNs show a highly improved photocatalysis under visible light irradiation. Overall, NMGCNs, characterized with monolayer and nanosized lateral dimension, fill the gap between large size (very high aspect ratio) and quantum dot-like counterparts, and show great potential applications as sensors, photo-related and electronic devices.

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“…[20][21][22][23][24][25] Besides the morphology of LDH material, the species and quantity of transition metal cations have significant impacts on their catalytic activity. It has been found that incorporate another metal element into FeNi LDH, the most active oxygen evolution reaction (OER) catalyst, can promote the electrocatalytic property on OER.…”

mentioning

confidence: 99%

Room-Temperature Synthesis FeNiCo Layered Double Hydroxide as an Excellent Electrochemical Water Oxidation Catalyst

Gao

Pan

Long

et al. 2017

J. Electrochem. Soc.

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Layered double hydroxides (LDH) have attracted tremendous attention in a variety of areas, including catalysis, energy storage, drug delivery, etc. Herein, we report a simple coprecipitation method to prepare highly active electrochemical catalysts of FeNiCo LDH at room temperature. In alkaline media, the as-obtained FeNi2Co2 LDH shows superior electrocatalytic activity toward water oxidation with an overpotential of 232 mV at 10 mA/cm2 and a low Tafel slope of 48 mV/dec, comparable to most of the reported noble-metal free OER catalysts. The suitable electronic structures as well as reduced charge transfer resistance that promote the electrons transfer during the OER process are proposed to be the two critical factors that lower the overpotential of the catalytic reaction.

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High-Yield Exfoliation of Ultrathin Two-Dimensional Ternary Chalcogenide Nanosheets for Highly Sensitive and Selective Fluorescence DNA Sensors

Cited by 228 publications

References 52 publications

Two-Dimensional Colloidal Nanocrystals

Two-Dimensional Colloidal Nanocrystals

Reduced-sized monolayer carbon nitride nanosheets for highly improved photoresponse for cell imaging and photocatalysis

Room-Temperature Synthesis FeNiCo Layered Double Hydroxide as an Excellent Electrochemical Water Oxidation Catalyst

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