High sensitivity of a carbon nanowall-based sensor for detection of organic vapours

Slobodian, Petr; Cvelbar, Uroš; Riha, Pavel; Olejník, Robert; Matyas, Jiri; Filipič, Gregor; Watanabe, Hitoshi; Tajima, Shogo; Kondo, Hiroki; Sekine, Makoto; Hori, Masaru

doi:10.1039/c5ra12000d

Cited by 21 publications

(16 citation statements)

References 28 publications

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“…CNW, also known as vertically oriented/aligned graphene sheets, are on long‐term stable, as far as structure and morphology are concerned, even when used in working devices. This nanomaterial has good durability over long‐time testing in acid solution, and functional stability when used in field emitters, electrodes for biosensors, and gas sensors, or as nanostructured electrodes in batteries, and supercapacitors …”

Section: Introductionmentioning

confidence: 99%

Aging phenomena and wettability control of plasma deposited carbon nanowall layers

Vizireanu

Ionita

et al. 2017

Plasma Process Polym

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This paper reports on the aging of carbon nanowalls (CNW) and modification of their wettability by the storage time, growth conditions, and post‐fabrication plasma treatments. The as‐deposited CNW initially exhibit marked hydrophilic behavior (fresh CNW), but within a few days they become highly hydrophobic (aged CNW). Their final hydrophobicity is closely related to their topography which is controlled by the deposition parameters. In addition, subsequent fluorinated plasma treatments result in super‐hydrophobic CNW layers, irrespective of the hydrophilic or hydrophobic character of the pre‐treated samples. To explain this, we show that the CNW edges contain many defects initially, but such defects become passivated in time. As a result, the surfaces become highly hydrophobic after aging or fluorination, having inert stable terminations.

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Section: Introductionmentioning

confidence: 99%

Aging phenomena and wettability control of plasma deposited carbon nanowall layers

Vizireanu

Ionita

et al. 2017

Plasma Process Polym

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“…The use of multilayer graphene oxide for water permeation and ion rejection has also been explored, both experimentally and numerically. , These works have shown that multilayering has the potential of improving desalination performance. Graphene membranes, which are vertically aligned to form carbon nanowalls, have also been successfully synthesized and used for various applications such as membranes, vapor detection, and energy storage. , …”

Section: Introductionmentioning

confidence: 99%

“…18,19 These works have shown that multilayering has the potential of improving desalination performance. Graphene membranes, which are vertically aligned to form carbon nanowalls, have also been successfully synthesized 20 such as membranes, 21 vapor detection, 22 and energy storage. 23,24 In our literature search, it was observed that a significant portion of works was based on purely numerical simulations, in particular molecular dynamics simulations.…”

Section: Introductionmentioning

confidence: 99%

On the Performance of Vertically Aligned Graphene Array Membranes for Desalination

Toh

Ang

Lin

et al. 2022

ACS Appl. Mater. Interfaces

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In this paper, we perform molecular dynamics simulations to investigate the performance of multilayer graphene slit membranes. Graphene slit membranes at a critical slit size have been found to be promising desalination membranes. In this contribution, it is shown that multilayer slit membranes have the potential to provide significantly better permeability while retaining outstanding salt rejection. Improved permeability of the membrane is achieved by using slits of widths larger than the critical slit size required to reject salt through size exclusion, and desalination of sea water is performed by increased resistance to salt passage through the multilayering. To facilitate the design process of future multilayer membranes, we analyze the flow resistance of the membrane as a combination of electrical resistors in series and show that this analogy works for membranes where the layers possess the same slit size, as well as membranes with layers of different slit sizes. Comparing with single layer graphene membranes, it was shown that it is possible to obtain 55% improvement in permeability without loss in salt rejection capabilities through multilayering. This opens up possibilities for membrane designers to be free from the restrictions of using a single layer graphene slit membrane with a fixed slit width.

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“…CNWs have also been used in energy storage, as electrodes for fuel cells, catalyst carriers, lithium-ion batteries or field emission devices [ 37 , 38 , 39 , 40 , 41 , 42 ]. In addition, the unique properties of CNWs make these electrodes an interesting starting material for the creation of electrochemical sensors for environmental, medical, and industrial analysis [ 21 , 43 , 44 , 45 ].…”

Section: Introductionmentioning

confidence: 99%

Good Choice of Electrode Material as the Key to Creating Electrochemical Sensors—Characteristics of Carbon Materials and Transparent Conductive Oxides (TCO)

2021

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The search for new electrode materials has become one of the goals of modern electrochemistry. Obtaining electrodes with optimal properties gives a product with a wide application potential, both in analytics and various industries. The aim of this study was to select, from among the presented electrode materials (carbon and oxide), the one whose parameters will be optimal in the context of using them to create sensors. Electrochemical impedance spectroscopy and cyclic voltammetry techniques were used to determine the electrochemical properties of the materials. On the other hand, properties such as hydrophilicity/hydrophobicity and their topological structure were determined using contact angle measurements and confocal microscopy, respectively. Based on the research carried out on a wide group of electrode materials, it was found that transparent conductive oxides of the FTO (fluorine doped tin oxide) type exhibit optimal electrochemical parameters and offer great modification possibilities. These electrodes are characterized by a wide range of work and high chemical stability. In addition, the presence of a transparent oxide layer allows for the preservation of valuable optoelectronic properties. An important feature is also the high sensitivity of these electrodes compared to other tested materials. The combination of these properties made FTO electrodes selected for further research.

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High sensitivity of a carbon nanowall-based sensor for detection of organic vapours

Abstract: The high sensitivity in response, selectivity and reversibility was achieved on a carbon nanowall-based sensor for the vapor detection of volatile organic compounds, which were tested by an electrical resistance method during adsorption and desorption cycles.

Cited by 21 publications

References 28 publications

Aging phenomena and wettability control of plasma deposited carbon nanowall layers

Aging phenomena and wettability control of plasma deposited carbon nanowall layers

On the Performance of Vertically Aligned Graphene Array Membranes for Desalination

Good Choice of Electrode Material as the Key to Creating Electrochemical Sensors—Characteristics of Carbon Materials and Transparent Conductive Oxides (TCO)

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