Recent developments in 2D layered inorganic nanomaterials for sensing

Nanoscale ◽  
2015 ◽  
Vol 7 (32) ◽  
pp. 13293-13312 ◽  
Author(s):  
Padmanathan Karthick Kannan ◽  
Dattatray J. Late ◽  
Hywel Morgan ◽  
Chandra Sekhar Rout
Keyword(s):  
Gas Sensing ◽  
2D Materials ◽  
Electrochemical Sensing ◽  
Comprehensive Overview ◽  
Sensing Applications ◽  
Recent Developments ◽  
Inorganic Nanomaterials ◽  
Salient Features

A comprehensive overview on the recent developments in the application of 2D layered inorganic nanomaterials as sensors is presented. Salient features of 2D materials in different sensing applicationsviz.gas sensing, electrochemical sensing, SERS and biosensing and photodetection are discussed.

scholarly journals 2D Materials for Gas Sensing Applications: A Review on Graphene Oxide, MoS2, WS2 and Phosphorene

Sensors ◽  
2018 ◽  
Vol 18 (11) ◽  
pp. 3638 ◽  
Author(s):  
Maurizio Donarelli ◽  
Luca Ottaviano
Keyword(s):  
Graphene Oxide ◽  
Gas Sensing ◽  
2D Materials ◽  
High Surface ◽  
Volume Ratio ◽  
Thick Layer ◽  
Research Field ◽  
First Year ◽  
Sensing Applications ◽  
Recent Developments

After the synthesis of graphene, in the first year of this century, a wide research field on two-dimensional materials opens. 2D materials are characterized by an intrinsic high surface to volume ratio, due to their heights of few atoms, and, differently from graphene, which is a semimetal with zero or near zero bandgap, they usually have a semiconductive nature. These two characteristics make them promising candidate for a new generation of gas sensing devices. Graphene oxide, being an intermediate product of graphene fabrication, has been the first graphene-like material studied and used to detect target gases, followed by MoS2, in the first years of 2010s. Along with MoS2, which is now experiencing a new birth, after its use as a lubricant, other sulfides and selenides (like WS2, WSe2, MoSe2, etc.) have been used for the fabrication of nanoelectronic devices and for gas sensing applications. All these materials show a bandgap, tunable with the number of layers. On the other hand, 2D materials constituted by one atomic species have been synthetized, like phosphorene (one layer of black phosphorous), germanene (one atom thick layer of germanium) and silicone (one atom thick layer of silicon). In this paper, a comprehensive review of 2D materials-based gas sensor is reported, mainly focused on the recent developments of graphene oxide, exfoliated MoS2 and WS2 and phosphorene, for gas detection applications. We will report on their use as sensitive materials for conductometric, capacitive and optical gas sensors, the state of the art and future perspectives.

A review on mechanisms and recent developments in p-n heterojunctions of 2D materials for gas sensing applications

2021 ◽  
Vol 56 (16) ◽  
pp. 9575-9604
Author(s):  
Minu Mathew ◽  
Pratik V. Shinde ◽  
Rutuparna Samal ◽  
Chandra Sekhar Rout
Keyword(s):  
Gas Sensing ◽  
2D Materials ◽  
Sensing Applications ◽  
Recent Developments

Schottky diodes based on 2D materials for environmental gas monitoring: a review on emerging trends, recent developments and future perspectives

2021 ◽  
Author(s):  
Minu Mathew ◽  
Chandra Sekhar Rout
Keyword(s):  
Gas Sensing ◽  
2D Materials ◽  
Schottky Diodes ◽  
High Sensitivity ◽  
Future Perspectives ◽  
Working Temperature ◽  
Emerging Trends ◽  
Gas Sensing Properties ◽  
Recent Developments ◽  
Sensitivity And Selectivity

This review details the fundamentals, working principles and recent developments of Schottky junctions based on 2D materials to emphasize their improved gas sensing properties including low working temperature, high sensitivity, and selectivity.

scholarly journals Tribology of 2D Nanomaterials: A Review

2020 ◽  
Author(s):  
Paul С. Uzoma ◽  
Huan Hu ◽  
Mahdi Khadem ◽  
Oleksiy V. Penkov
Keyword(s):  
High Performance ◽  
2D Materials ◽  
Chemical Properties ◽  
Solid Lubricants ◽  
Friction Behavior ◽  
Comprehensive Overview ◽  
Wear Rates ◽  
Recent Developments ◽  
Frictional Coefficients ◽  
Physical And Chemical

The exfoliation of graphene has opened a new frontier in material science with a focus on 2D materials. The unique thermal, physical and chemical properties of these materials have made them one of the choicest candidates in novel mechanical and nano-electronic devices. Notably, 2D materials such as graphene, MoS2, WS2, h-BN, and Black Phosphorus have shown outstanding lowest frictional coefficients and wear rates, making them attractive materials for high-performance nano-lubricants and lubricating applications. The objective of this work is to provide a comprehensive overview of the most recent developments in the tribological potentials of 2D materials. At first, the essential physical, wear, and frictional characteristics of the 2D materials including their production techniques are discussed. Subsequently, the experimental explorations and theoretical simulations of the most common 2D materials are reviewed in regards to their tribological applications such as their use as solid lubricants and surface lubricant nano-additives. The effects of micro/nano textures on friction behavior are also reviewed. Finally, the current challenges in tribological applications of 2D materials and their prospects are discussed.

scholarly journals Tribology of 2D Nanomaterials: A Review

Coatings ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 897
Author(s):  
Paul C. Uzoma ◽  
Huan Hu ◽  
Mahdi Khadem ◽  
Oleksiy V. Penkov
Keyword(s):  
High Performance ◽  
2D Materials ◽  
Chemical Properties ◽  
Solid Lubricants ◽  
Friction Behavior ◽  
Comprehensive Overview ◽  
Wear Rates ◽  
Recent Developments ◽  
Frictional Coefficients ◽  
Physical And Chemical

The exfoliation of graphene has opened a new frontier in material science with a focus on 2D materials. The unique thermal, physical and chemical properties of these materials have made them one of the choicest candidates in novel mechanical and nano-electronic devices. Notably, 2D materials such as graphene, MoS2, WS2, h-BN and black phosphorus have shown outstanding lowest frictional coefficients and wear rates, making them attractive materials for high-performance nano-lubricants and lubricating applications. The objective of this work is to provide a comprehensive overview of the most recent developments in the tribological potentials of 2D materials. At first, the essential physical, wear and frictional characteristics of the 2D materials including their production techniques are discussed. Subsequently, the experimental explorations and theoretical simulations of the most common 2D materials are reviewed in regards to their tribological applications such as their use as solid lubricants and surface lubricant nano-additives. The effects of micro/nano textures on friction behavior are also reviewed. Finally, the current challenges in tribological applications of 2D materials and their prospects are discussed.

Electrochemical Sensing Behavior of Graphdiyne Nanoflake Toward Uric Acid; A Quantum Chemical Approach

2021 ◽  
Author(s):  
Misbah Asif ◽  
Hasnain Sajid ◽  
Khurshid Ayub ◽  
Mazhar Amjad Gilani ◽  
Mohammed Salim Akhter ◽  
...  
Keyword(s):  
Uric Acid ◽  
Density Functional ◽  
Gas Sensing ◽  
Noncovalent Interaction ◽  
Electrochemical Sensing ◽  
Dispersion Energy ◽  
Sensing Applications ◽  
Π Stacking ◽  
Stability Of Complexes ◽  
Higher Sensitivity

Abstract Though, the gas sensing applications of graphdiyne have widely reported; however, the biosensing utility of graphdiyne needs to be explored. This study deals with the sensitivity of graphdiyne nanoflake (GDY) towards the uric acid (UA) within the density functional framework. The uric acid is allowed to interact with graphdiyne nanoflake from all the possible orientations. Based on these interacting geometries, the complexes are differentiated with naming i.e., UA1@GDY, UA2@GDY, UA3@GDY and UA4@GDY (Figure 1). The essence of interface interactions of UA on GDY is derived by computing geometric, energetic, electronic and optical properties. The adsorbing affinity of complexes is evaluated at ωB97XD/6-31+G(d,p) level of theory. The stabilities of the complexes are quantified through the interaction energies (Eint) with reasonable accuracy. The calculated Eint of the UA1@GDY, UA2@GDY, UA3@GDY and UA4@GDY complexes are -31.13, -25.87, -20.59 and -16.54 kcal/mol, respectively. In comparison with geometries, it is revealed that the higher stability of complexes is facilitated by π-π stacking. Other energetic analyses including symmetry adopted perturbation theory (SAPT0), noncovalent interaction index (NCI) and quantum theory of atoms in molecule (QTAIM) provided the evidence of dominating dispersion energy in stabilizing the resultant complexes. The HOMO-LUMO energies, NBO charge transfer and UV-vis analysis justify the higher electronic transition in UA1@GDY, plays a role of higher sensitivity of GDY towards the π-stacked geometries over all other possible interaction orientations. The present findings bestow the higher sensitivity of GDY towards uric acid via π-stacking interactions.

scholarly journals A Review of Inkjet Printed Graphene and Carbon Nanotubes Based Gas Sensors

Sensors ◽  
2020 ◽  
Vol 20 (19) ◽  
pp. 5642 ◽  
Author(s):  
Twinkle Pandhi ◽  
Ashita Chandnani ◽  
Harish Subbaraman ◽  
David Estrada
Keyword(s):  
Flexible Electronics ◽  
Inkjet Printing ◽  
Gas Sensing ◽  
Ambient Conditions ◽  
Sensing Applications ◽  
Recent Developments ◽  
Vapor Sensors ◽  
Multiwall Nanotubes ◽  
Modified Graphene ◽  
Single Wall Nanotubes

Graphene and carbon nanotube (CNT)-based gas/vapor sensors have gained much traction for numerous applications over the last decade due to their excellent sensing performance at ambient conditions. Inkjet printing various forms of graphene (reduced graphene oxide or modified graphene) and CNT (single-wall nanotubes (SWNTs) or multiwall nanotubes (MWNTs)) nanomaterials allows fabrication onto flexible substrates which enable gas sensing applications in flexible electronics. This review focuses on their recent developments and provides an overview of the state-of-the-art in inkjet printing of graphene and CNT based sensors targeting gases, such as NO2, Cl2, CO2, NH3, and organic vapors. Moreover, this review presents the current enhancements and challenges of printing CNT and graphene-based gas/vapor sensors, the role of defects, and advanced printing techniques using these nanomaterials, while highlighting challenges in reliability and reproducibility. The future potential and outlook of this rapidly growing research are analyzed as well.

scholarly journals A Review of Photothermal Detection Techniques for Gas Sensing Applications

2019 ◽  
Vol 9 (14) ◽  
pp. 2826 ◽  
Author(s):  
Krzempek
Keyword(s):  
Refractive Index ◽  
Radiation Source ◽  
Gas Sensing ◽  
Thermal Response ◽  
Photothermal Spectroscopy ◽  
Detection Techniques ◽  
Sensing Applications ◽  
Recent Developments ◽  
Unique Method ◽  
Interesting Alternative

Photothermal spectroscopy (PTS) is a technique used for determining the composition of liquids, solids and gases. In PTS, the sample is illuminated with a radiation source, and the thermal response of the analyte (e.g., refractive index) is analyzed to gain information about its content. Recent advances in this unique method of detecting gaseous samples show that photothermal gas spectroscopy can be an interesting alternative to commonly used absorption techniques. Moreover, if designed properly, sensors using PTS detection technique can not only reach sensitivities comparable with other, more complex techniques, but can significantly simplify the design of the sensor. In this review, recent developments in photothermal spectroscopy of gases will be summarized and discussed.

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