Self-Assembled Molecular Films of Alkanethiols on Graphene for Heavy Metal Sensing

Afsharimani, Nasima Sadat; Uluutku, Berkin; Saygin, Verda; Baykara, Mehmet Z.

doi:10.1021/acs.jpcc.7b09499

Cited by 13 publications

(13 citation statements)

References 35 publications

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“…(Feng et al, 1997) The binding of Hg 2+ to the channel right-shifts the Dirac point, the effect of which is quite evident in the I DS -V GS curve of the device. A similar, comparative study conducted by Afsharimani et al shows that the same scheme, of functionalizing graphene with alkanethiols, is more sensitive to the presence of Pb 2+ ions (Dirac shift of 30.2 G 6.8 V) as compared to Hg 2+ (Dirac shift of 7.1 G 4.8 V) (Afsharimani et al, 2018). Both the studies exhibit detection of the analytes at 10 ppm concentration.…”

Section: Chemical Sensingsupporting

confidence: 58%

2D material based field effect transistors and nanoelectromechanical systems for sensing applications

et al. 2021

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Sensors are ubiquitous in modern society because of their wide applications in healthcare, security, forensic industries as well as environmental protection. Specifically, sensors which can be microfabricated employing very-large-scale-integration (VLSI) compatible microfabrication techniques are particularly desirable. This is because they can provide several advantages: small size, low cost, and possibility of mass fabrication. 2D materials are a promising building block for such sensors. Their atomically thin nature, flat surfaces and ability to form van der Waals hetero junctions opens up the pathway for versatile functionalities. Here, we review 2D material-based field-effect-transistors (FETs) and nano-electro-mechanical systems (NEMs) for applications in detecting different gases, chemicals, and biomolecules. We will provide insights into the unique advantages of these materials for these sensing applications and discuss the fabrication methods, detection schemes and performance pertaining to these technologies. Finally, we will discuss the current challenges and prospects for this field.

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Section: Chemical Sensingsupporting

confidence: 58%

2D material based field effect transistors and nanoelectromechanical systems for sensing applications

et al. 2021

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“…The high sensitivity to mercury was attributed to the presence of thiol groups in 1-octadecanethiol monolayer. Baykara and co-workers further demonstrated that chemically vapor grown graphene functionalized with 1-octadecanethiol could detect both mercury and lead ions at 10 ppm concentrations . The authors proposed that the electrostatic gating effect was responsible for the sensing behavior of the fabricated sensing devices.…”

Section: Sensing Applicationsmentioning

confidence: 99%

Electrically-Transduced Chemical Sensors Based on Two-Dimensional Nanomaterials

et al. 2019

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Electrically−transduced sensors, with their simplicity and compatibility with standard electronic technologies, produce signals that can be efficiently acquired, processed, stored, and analyzed. Two dimensional (2D) nanomaterials, including graphene, phosphorene (BP), transition metal dichalcogenides (TMDCs), and others, have proven to be attractive for the fabrication of high−performance electricallytransduced chemical sensors due to their remarkable electronic and physical properties originating from their 2D structure. This review highlights the advances in electricallytransduced chemical sensing that rely on 2D materials. The structural components of such sensors are described, and the underlying operating principles for different types of architectures are discussed. The structural features, electronic properties, and surface chemistry of 2D nanostructures that dictate their sensing performance are reviewed. Key advances in the application of 2D materials, from both a historical and analytical perspective, are summarized for four different groups of analytes: gases, volatile compounds, ions, and biomolecules. The sensing performance is discussed in the context of the molecular design, structure−property relationships, and device fabrication technology. The outlook of challenges and opportunities for 2D nanomaterials for the future development of electrically-transduced sensors is also presented.

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“…The outstanding sensitivity toward Hg 2+ was credited to occurrence of thiol group in ML 1‐octadecanethiol. Baykara and co‐workers [ 342 ] also confirmed that the CVD grown the 2D‐G functionalized with 1‐octadecanethiol can selectively analyze both Hg 2+ and Pb 2+ ions at 10 ppm concentrations. It is inferred that electrostatic gating consequence was accountable for sensing performance in manufactured sensor.…”

Section: Applications Of the Group IV 2d Xenesmentioning

confidence: 84%

Sensing Applications of Atomically Thin Group IV Carbon Siblings Xenes: Progress, Challenges, and Prospects

Khan

Tareen

Wang

et al. 2020

Adv Funct Materials

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The 2D graphene (G) nanosheets (NSs) discovery is amound the foremost revolutionary incidents in materials science history. This discovery has stimulated huge attention in the study of other novel 2D materials (2DMs). This trend might be called modern day "alchemy," where the basic aim is to convert most of periodic table elements into G like 2D structures. Monoelemental, atomically thin 2DMs, called "Xenes" ("X" = group (III-VI)A elements, "ene" suffix that indicates one atom thick 2D layer of atoms) which are a newly invented family among nanomaterials. The number of predicted and experimentally synthesized 2D Xene materials of group IVA, i.e., G's siblings, has gained attention in nanosize devices. Such materials involve buckle structures that have recently been experimentally fabricated. The 2D Xene materials analog to G offer exciting potential for novel sensing applications. The group IVA Xenes, in cooperation with their ligandfunctionalized derivatives, arrange in a honeycomb lattice analogous to G but through a changeable degree of buckling. Their electronic structure ranges from trivial insulators passing via semiconductors with tunable gaps, to semimetallic, depending on substrate, chemical functionalization, and strain. In this review, different potential synthesis methods for group IVA 2D Xenes are briefly presented. A brief overview of their properties obtained theoretically and experimentally is presented, and finally their potential sensing applications are discussed.

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Self-Assembled Molecular Films of Alkanethiols on Graphene for Heavy Metal Sensing

Cited by 13 publications

References 35 publications

2D material based field effect transistors and nanoelectromechanical systems for sensing applications

2D material based field effect transistors and nanoelectromechanical systems for sensing applications

Electrically-Transduced Chemical Sensors Based on Two-Dimensional Nanomaterials

Sensing Applications of Atomically Thin Group IV Carbon Siblings Xenes: Progress, Challenges, and Prospects

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