Sulfur dioxide molecule sensors based on zigzag graphene nanoribbons with and without Cr dopant

Shao, Li; Chen, Guangde; Ye, Honggang; Niu, Haibo; Wu, Yelong; Zhu, Yun; Ding, Bingjun

doi:10.1016/j.physleta.2013.12.042

Cited by 39 publications

(15 citation statements)

References 36 publications

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“…Since the advent of nanotechnology, numerous studies have been focused on the graphene, nanoclusters, nanotubes nanocapsules nanocones, nanoribbons, etc. as chemical sensors because of their great surface/volume ratio, high sensitivity, fast response time, and reusability [11][12][13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

B 36 borophene as an electronic sensor for formaldehyde: Quantum chemical analysis

2016

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Section: Introductionmentioning

confidence: 99%

B 36 borophene as an electronic sensor for formaldehyde: Quantum chemical analysis

2016

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“…Carbon-based materials, such as nanotubes and graphene, are widely accepted as a good sensor to monitor small gas molecules, such as CO, NO, NO 2 , and NH 3 molecules [1][2][3][4][5][6][7][8][9]. In particular, the detection of the CO molecule to prevent poisoning is of vital importance, due to the fact that CO is colorless, tasteless, and odorless, but toxic and flammable.…”

Section: Introductionmentioning

confidence: 99%

Highly Sensitive CO Gas Sensor from Defective Graphene: Role of van der Waals Interactions

Jiang

Yang

et al. 2015

Journal of Nanomaterials

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Layered materials, such as graphene, have attracted increasing interests since they can be extensively used in gas sensors, spintronic devices, and transparent electrodes. Although larger size of graphene sheets has been fabricated, in reality, the existence of the defects in layered materials is almost inevitable during the manufacturing process. Here, we performed the state-of-the-art density-functional theory calculations to study the interactions between CO molecule and the pristine and defective graphene layers, with the aim of designing a CO gas sensor with higher sensitivity. The van der Waals interactions predominate the binding between the CO gas and the sensor, and also significantly enhance the stability of the system. The defective graphene strongly interacts with CO, and thus enhances the sensitivity of the graphene and further tunes the electronic and magnetic properties of the entire system. Our computed results clearly demonstrate that the defective graphene could be a good sensor for gas molecules.

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“…Moreover, the new gas sensor exhibited reliable and repeatable sensing behaviors even at a low concentration of 30 ppm for hydrogen (H 2 ). [ 179 ] In addition, it was proved theoretically that GNR FETs can be applied to detect a series of gases such as O 2 , [ 180 ] CO, [181][182][183][184] CO 2 , [ 181,183 ] NO, [ 181 ] NO 2 , [ 185 ] NH 3 , [ 181,182 ] N 2 , [ 182 ] SO 2 [ 186,187 ] and H 2 S. [ 187 ] The sensing mechanisms of some gas sensors are attributed to the armchair edge [ 181,183,185 ] or the zigzag edge [ 182,186,187 ] of GNRs. In particular, it was suggested that ZGNRs decorated with the titanium and tin atoms could be used in the detection of H 2 S and SO 2 .…”

Section: Gas Sensorsmentioning

confidence: 99%

Controllable Fabrication of Nanostructured Graphene Towards Electronics

Zeng

Xiao

Liu

et al. 2016

Adv Elect Materials

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applications, especially for fi eld-effect transistors (FETs) and sensors. [3][4][5][6] However, Klein tunneling in graphene and the related electron confi nement represent a real barrier to the development of graphene-based transistors, which results in a lack of band gap and the inability to confi ne electrons. [ 7 ] Therefore, although high mobility and high current are essential for high-frequency applications, this intrinsically high off-state current and low on/off ratio hinder the potential applications of graphene in FETs operated at room temperature.Numerous efforts have been devoted to inducing a band gap in graphene by chemical modifi cation, [8][9][10] the application of a perpendicular electric fi eld to bilayer graphene, [11][12][13] and other methods. [ 14 ] Nevertheless, these methods are uncontrollable and the as-constructed devices usually exhibit poor electronic performance. The fabrication of nanostructured graphene can be a quite effective way to introduce a bandgap. [ 15 ] Generally, nanostructured graphene refers to a graphene structure of intermediate size between microscopic and molecular, in which one dimension must be at the nanoscale, including graphene nanoribbons (GNRs), graphene nanomeshes, graphene nanodisks, graphene quantum dots, graphene nanoheterostructures, and so on. Among those graphene nanostructures, GNRs are the most popular and potentially useful ones for electronic applications; therefore, we will mainly concentrate on the progress made in GNRs. The narrowing of graphene fi lm into stripes with widths <10 nm was studied both theoretically and experimentally to create an energy band in the electronic structure of graphene due to quantum confi nement, which is the most effective way to open the band gap of graphene. In fact, the band gap is determined by the states of the edge and the width of the nanoribbon. [ 15 ] Tight binding (TB) calculations predict that GNRs terminated with 'armchair' edges can be either metallic or semi-conducting depending on their widths. Nanoribbons terminated with 'zigzag' edges are always metallic regardless of their widths. In order for the GNRs to open band gaps of a similar order as commonly used semiconducting materials (e.g. Si (1.14 eV), GaAs (1.43 eV)) widths of less than 2 nm are likely to be necessary. [ 16 ] Therefore, as the fi rst step to implement the electronic applications, nanostructured graphene must be directly synthesized Due to graphene's exceptional electronic properties, strong efforts are being made to push forward its nanoelectronic applications. However, the gapless band structure of truly 2D graphene makes it unsuitable for direct use in graphene-based fi eld-effect transistors (FETs), which is one of the most widely discussed graphene applications in electronics. Therefore, in order to accomplish graphene's applications in semiconducting nanoelectronics, it is necessary to produce nanostructured graphene with suffi ciently narrow characteristic width, thus introducing further confi nement and opening a reasonably la...

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Sulfur dioxide molecule sensors based on zigzag graphene nanoribbons with and without Cr dopant

Cited by 39 publications

References 36 publications

B 36 borophene as an electronic sensor for formaldehyde: Quantum chemical analysis

B 36 borophene as an electronic sensor for formaldehyde: Quantum chemical analysis

Highly Sensitive CO Gas Sensor from Defective Graphene: Role of van der Waals Interactions

Controllable Fabrication of Nanostructured Graphene Towards Electronics

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