Rapid Characterization of Ultrathin Layers of Chalcogenides on SiO<sub>2</sub>/Si Substrates

Late, Dattatray J.; Liu, Bin; Matte, H. S. S. Ramakrishna; Rao, C. N. R.; Dravid, Vinayak P.

doi:10.1002/adfm.201102913

Cited by 463 publications

(404 citation statements)

References 36 publications

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“…[13c,19] A typical synthesis produces approximately 300 mL of MoS 2 at a concentration ≥300 ppm (see the Experimental Section) and is easily scalable. Physical characterization of the resultant sheets using atomic force microscopy (n = 100) revealed mean longest diagonals of 0.80 μm with an average thickness of 1.56 nm (n = 40 sheets), which is consistent with a MoS 2 monolayer [20] ( Figure 1 and Figure S1 in the Supporting Information).…”

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confidence: 48%

Chemically Exfoliated MoS₂ as Near‐Infrared Photothermal Agents

et al. 2013

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confidence: 48%

Chemically Exfoliated MoS₂ as Near‐Infrared Photothermal Agents

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“…Optical microscopy, atomic force microscopy and Raman spectroscopy were employed to identify the monolayers 20 . FIG.…”

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Temperature-Dependent Nonlinear Phonon Shifts in a Supported MoS₂ Monolayer

Taube

Judek

Jastrzębski

et al. 2014

ACS Appl. Mater. Interfaces

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We report Raman spectra measurements on a MoS2 monolayer supported on SiO2 as a function of temperature. Unlike in previous studies, the positions of the two main Raman modes, 2 1 and 1 exhibited nonlinear temperature dependence. Temperature dependence of phonon shifts and widths is explained by optical phonon decay process into two acoustic phonons. Based on Raman measurements local temperature change under laser heating power at different global temperatures is derived. Obtained results contribute to our understanding of the thermal properties of twodimensional atomic crystals and can help to solve the problem of heat dissipation, which is crucial for use in the next generation of nanoelectronic devices.

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“…remarkable electrical and optical properties which are highly dependent on the number of layers present on the materials [5,6]. The surface to volume ratio of the layered materials is also dependent on the number of layers.…”

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“…This has direct relevance to develop new molecular design, computing facility, programming and assembly of the new functional materials. remarkable electrical and optical properties which are highly dependent on the number of layers present on the materials [5,6]. The surface to volume ratio of the layered materials is also dependent on the number of layers.…”

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“…Also, many interesting and exceptional properties appropriate for sensing applications can be realized by integrating them into composite and hybrids assemblies. To date several inorganic 2D TMDCs layered materials such including MoS 2 [5][6][7][8], WS 2 [9-10], MoSe [11,12], WSe 2 [11], and III-VI group semiconducting layered materials GaS and GaSe [13] etc. reported and identified for possible nanoelectronic device applications.…”

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A Perspective on Atomically Thin 2D Inorganic Layered Materials for Biosensor

Late

Rout²

2014

JNMR

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The biosensors field has been under progress for the last 45 years and the research in this field has become very popular since last 25 years. Biosensor is nothing but a device where a biological recognition element is built in (physically attached or confined) and is the primary selectivity element. Biosensors are also known as biochips, immune sensors, glucometers, biocomputers, optrodes, chemical canaries, resonant mirrors and so on. Many sensors used for biological purposes are therefore not biosensors, including those for temperature, pressure, electrocardiograms, pH, Ca 2+ , catecholamine's and the like [16]. Compared to other traditional analytical techniques, biosensors show several advantages such as high specificity, high sensitivity and low cost. In biosensor devices, recognition elements play a vital role in the detection of electro active species. Examples of some of the bio-recognition elements are enzymes, microorganisms, nucleic acids, cells and anti-bodies. Among these, enzymes are widely used in electrochemical biosensors. Much of the biosensors so far reported employed electrochemical techniques in which the electrical properties of the bio-system are extracted by using a suitable bio-recognition element. Various electrochemical techniques such as amperometry, potentiometry and cyclic voltametry have been widely used in the development of electrochemical biosensors. Recently, impedance based electrochemical biosensors are emerging because of its ability to detect very low concentration of species at ppb level. Other than electrochemical approaches, some of the techniques like optical, gravimetric are being employed in biosensing application. During the past few years, extensive efforts have been taken for developing biosensors with high sensitivity and low detection limit using various nanostructured materials.The use of layered inorganic nanomaterials in the development of biosensors is recently emerging because of its IntroductionGraphene has attracted much attention in recent years due to many potential proof-of-concept device demonstrations; such as transistors [1], solar cells [2] and especially gas sensors [3] and biosensors [4]. For gas sensors, the ancient experience of conventional semiconducting metal oxides indicates improved performance with increase in the surface-to-volume ratio, unique physical and chemical properties, excellent electrical conductivity, good chemical stability and strong mechanical strength. This has inspired scientific community to use graphene a one-atomically thin 2D materials which has exceedingly high surface-to-volume ratio and is believed to outperform traditional sensors and biosensor. Indeed, there are reports on graphene which shows good sensing [3] and biosensing performance [4]. However, other than surface-to-volume ratio, other significant factors for a good sensor include the semiconducting nature of the materials and easy accessibility for the reactive sites for the redox reactions. Graphene due to its limitation as band gap material hinders its w...

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Rapid Characterization of Ultrathin Layers of Chalcogenides on SiO₂/Si Substrates

Cited by 463 publications

References 36 publications

Chemically Exfoliated MoS₂ as Near‐Infrared Photothermal Agents

Chemically Exfoliated MoS₂ as Near‐Infrared Photothermal Agents

Temperature-Dependent Nonlinear Phonon Shifts in a Supported MoS₂ Monolayer

A Perspective on Atomically Thin 2D Inorganic Layered Materials for Biosensor

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Rapid Characterization of Ultrathin Layers of Chalcogenides on SiO2/Si Substrates

Cited by 463 publications

References 36 publications

Chemically Exfoliated MoS2 as Near‐Infrared Photothermal Agents

Chemically Exfoliated MoS2 as Near‐Infrared Photothermal Agents

Temperature-Dependent Nonlinear Phonon Shifts in a Supported MoS2 Monolayer

A Perspective on Atomically Thin 2D Inorganic Layered Materials for Biosensor

Contact Info

Product

Resources

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Rapid Characterization of Ultrathin Layers of Chalcogenides on SiO₂/Si Substrates

Chemically Exfoliated MoS₂ as Near‐Infrared Photothermal Agents

Chemically Exfoliated MoS₂ as Near‐Infrared Photothermal Agents

Temperature-Dependent Nonlinear Phonon Shifts in a Supported MoS₂ Monolayer