Comparison of MoS<sub>2</sub>, WS<sub>2</sub>, and Graphene Oxide for DNA Adsorption and Sensing

Lu, Chang; Liu, Yibo; Ying, Yibin; Liu, Juewen

doi:10.1021/acs.langmuir.6b04502

Cited by 180 publications

(156 citation statements)

References 55 publications

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“…Transition‐metal dichalcogenides (TMDs) have gained recent eminence in the scientific community sparked by their intriguing properties and exciting prospects for a myriad of applications. Presently, numerous studies touched on the versatile attributes of TMDs and demonstrated their prospective use in batteries, supercapacitors, photovoltaics, field‐effect transistors, sensing, and catalysis . TMDs adopt a general formula of MX 2 where M is a transition metal and X is a chalcogen (e.g., S, Se, Te).…”

Section: Introductionmentioning

confidence: 99%

Morphological Effects and Stabilization of the Metallic 1T Phase in Layered V‐, Nb‐, and Ta‐Doped WSe₂ for Electrocatalysis

Chia

Sutrisnoh

Sofer

et al. 2018

Chemistry A European J

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Layered transition-metal dichalcogenides (TMDs) are valued for their electrocatalytic properties toward the hydrogen-evolution reaction (HER) and oxygen-reduction reaction (ORR). One effective strategy to activate the electrocatalytic properties of TMDs is through doping. The optimistic outlook of doped-MoS as an electrocatalyst witnessed in previous reports spurred us to examine the effect of doping WSe with Group 5 transition-metal species, namely V, Nb, and Ta, in aspects of inherent electroactivities and catalysis. Apart from the mild reduction signal unique to the Group 5 transition-metal dopants, the Group 5 transition-metal-doped WSe materials are found to possess largely identical inherent electrochemistry to the undoped WSe with a characteristic anodic peak. Living up to expectations, the Group 5 transition-metal-doped WSe materials exhibit improved electrocatalytic HER efficiency, as evident by the lower HER overpotentials and Tafel slopes relative to undoped WSe . After doping with V, Nb, or Ta species, an increased number of active sites is observed given the distinct changes in morphology from thick bulky pieces in undoped WSe to thinner fragments in doped WSe . Although undoped WSe exists in the semiconducting 2H phase, the Group 5 transition-metal-doped WSe materials are dominated by the metallic 1T phase. Doping WSe with V, Nb, or Ta stabilizes the catalytic 1T phase and appears to induce the transition from the 2H to 1T phase. In contrast to the enhanced HER performance of WSe upon doping, Group 5 transition-metal dopants proved futile in activating the ORR electrocatalytic behavior of WSe , for which the ORR efficiency is unchanged. Therefore, these findings facilitate the understanding of the role of Group 5 transition-metal dopants in the electrochemical and catalytic properties of WSe relative to their morphological features and provide an evaluation of the efficacy of doping TMDs in electrocatalytic applications.

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Section: Introductionmentioning

confidence: 99%

Morphological Effects and Stabilization of the Metallic 1T Phase in Layered V‐, Nb‐, and Ta‐Doped WSe₂ for Electrocatalysis

Chia

Sutrisnoh

Sofer

et al. 2018

Chemistry A European J

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“…However,M oS 2 and WS 2 do not have such groups and they interact with DNAvia van der Waals forces. [20] Interestingly,C 15 still induced the most desorption on MoS 2 and WS 2 ( Figure 3B,C). In particular, when the FAM-C 15 was adsorbed, only C 15 induced its desorption, suggesting that C 15 can also serve as as table anchor on them.…”

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confidence: 99%

Poly‐cytosine DNA as a High‐Affinity Ligand for Inorganic Nanomaterials

et al. 2017

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Attaching DNA to nanomaterials is the basis for DNA-directed assembly, sensing, and drug delivery using such hybrid materials. Poly-cytosine (poly-C) DNA is a high affinity ligand for four types of commonly used nanomaterials, including nanocarbons (graphene oxide and single-walled carbon nanotubes), transition metal dichalcogenides (MoS and WS ), metal oxides (Fe O and ZnO), and metal nanoparticles (Au and Ag). Compared to other homo-DNA sequences, poly-C DNA has the highest affinity for the first three types of materials. Using a diblock DNA containing a poly-C block to attach to surfaces, the target DNA was successfully hybridized to the other block on graphene oxide more efficiently than that containing a typical poly-A block, especially in the presence of non-specific background DNA, proteins, or surfactants. This work provides a simple solution for functionalizing nanomaterials with non-modified DNA and offers new insights into DNA biointerfaces.

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“…[12,54] d) Transition metal dichalcogenides interact with DNA via van der Waals force. [55] Therefore, each type of surfaceh as ad ifferent interaction mechanism with DNA, and DNA is extremely versatile for binding to surfaces. Note that we only discussed non-specific binding based solely on the chemicalp roperty of nucleotides and DNA, withoutc onsidering the sequence and structure of DNA.…”

Section: Classification Of Surfaces For Dna Bindingmentioning

confidence: 99%

Selection and Screening of DNA Aptamers for Inorganic Nanomaterials

Zhou

Huang

Yang

et al. 2017

Chemistry A European J

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Searching for DNA sequences that can strongly and selectively bind to inorganic surfaces is a long-standing topic in bionanotechnology, analytical chemistry and biointerface research. This can be achieved either by aptamer selection starting with a very large library of ≈10 random DNA sequences, or by careful screening of a much smaller library (usually from a few to a few hundred) with rationally designed sequences. Unlike typical molecular targets, inorganic surfaces often have quite strong DNA adsorption affinities due to polyvalent binding and even chemical interactions. This leads to a very high background binding making aptamer selection difficult. Screening, on the other hand, can be designed to compare relative binding affinities of different DNA sequences and could be more appropriate for inorganic surfaces. The resulting sequences have been used for DNA-directed assembly, sorting of carbon nanotubes, and DNA-controlled growth of inorganic nanomaterials. It was recently discovered that poly-cytosine (C) DNA can strongly bind to a diverse range of nanomaterials including nanocarbons (graphene oxide and carbon nanotubes), various metal oxides and transition-metal dichalcogenides. In this Concept article, we articulate the need for screening and potential artifacts associated with traditional aptamer selection methods for inorganic surfaces. Representative examples of application are discussed, and a few future research opportunities are proposed towards the end of this article.

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Comparison of MoS₂, WS₂, and Graphene Oxide for DNA Adsorption and Sensing

Cited by 180 publications

References 55 publications

Morphological Effects and Stabilization of the Metallic 1T Phase in Layered V‐, Nb‐, and Ta‐Doped WSe₂ for Electrocatalysis

Morphological Effects and Stabilization of the Metallic 1T Phase in Layered V‐, Nb‐, and Ta‐Doped WSe₂ for Electrocatalysis

Poly‐cytosine DNA as a High‐Affinity Ligand for Inorganic Nanomaterials

Selection and Screening of DNA Aptamers for Inorganic Nanomaterials

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Comparison of MoS2, WS2, and Graphene Oxide for DNA Adsorption and Sensing

Cited by 180 publications

References 55 publications

Morphological Effects and Stabilization of the Metallic 1T Phase in Layered V‐, Nb‐, and Ta‐Doped WSe2 for Electrocatalysis

Morphological Effects and Stabilization of the Metallic 1T Phase in Layered V‐, Nb‐, and Ta‐Doped WSe2 for Electrocatalysis

Poly‐cytosine DNA as a High‐Affinity Ligand for Inorganic Nanomaterials

Selection and Screening of DNA Aptamers for Inorganic Nanomaterials

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Product

Resources

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Comparison of MoS₂, WS₂, and Graphene Oxide for DNA Adsorption and Sensing

Morphological Effects and Stabilization of the Metallic 1T Phase in Layered V‐, Nb‐, and Ta‐Doped WSe₂ for Electrocatalysis

Morphological Effects and Stabilization of the Metallic 1T Phase in Layered V‐, Nb‐, and Ta‐Doped WSe₂ for Electrocatalysis