Chemical gases sensing properties of diamond nanocone arrays formed by plasma etching

Wang, Q.; Qu, Shi Liang; Fu, Shuai; Liu, W. J.; Li, J. J.; Gu, Changzhi

doi:10.1063/1.2817465

Cited by 31 publications

(17 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The origin of the variation in the surface conductivity on the gas type has been the subject of a number of studies [ 14 – 16 ]. Overall, when oxidizing or reducing gases appear in the atmosphere, the charge exchange between the diamond and the adsorbed molecules causes an increase or a decrease in the conductance.…”

Section: Resultsmentioning

confidence: 99%

Gas sensing properties of nanocrystalline diamond at room temperature

Davydova¹,

Kulha

Laposa

et al. 2014

Beilstein J. Nanotechnol.

View full text Add to dashboard Cite

SummaryThis study describes an integrated NH3 sensor based on a hydrogenated nanocrystalline diamond (NCD)-sensitive layer coated on an interdigitated electrode structure. The gas sensing properties of the sensor structure were examined using a reducing gas (NH3) at room temperature and were found to be dependent on the electrode arrangement. A pronounced response of the sensor, which was comprised of dense electrode arrays (of 50 µm separation distance), was observed. The sensor functionality was explained by the surface transfer doping effect. Moreover, the three-dimensional model of the current density distribution of the hydrogenated NCD describes the transient flow of electrons between interdigitated electrodes and the hydrogenated NCD surface, that is, the formation of a closed current loop.

show abstract

Section: Resultsmentioning

confidence: 99%

Gas sensing properties of nanocrystalline diamond at room temperature

Davydova¹,

Kulha

Laposa

et al. 2014

Beilstein J. Nanotechnol.

View full text Add to dashboard Cite

show abstract

“…15 This surface conductivity is highly dependent on the pH in aqueous media when the surface is slightly oxidised, which has led to the development of pH sensors based on those conductivity phenomena. 16 Flat 17,18 or nano-structured 19,20 hydrogenated diamond surfaces were also studied for gas sensing, where surface conductivity variations are measured upon gas exposure.…”

Section: Physical Propertiesmentioning

confidence: 99%

Diamond-based Resonators for Chemical Detection

Scorsone

Trouvé

2014

Nanodiamond

View full text Add to dashboard Cite

Chemical/biochemical sensors are devices that transform chemical or biological information into an analytically useful signal. Generally speaking, they are the result of coupling a selective layer to a physical part known as the transducer. The sensors may be classified according to the operating principle of the transducer. In brief, the main transduction phenomena are optical, electrochemical, electrical and gravimetric. 1 A wide variety of innovative chemical and biochemical sensor technologies are being reported in the literature every year, often showing highly promising performances. However, when it comes to commercial sensors, one has to admit that the market is very conservative. A possible explanation for this is the lack of robustness and reliability of the newly developed sensors and, therefore, their difficulty to maintain performance specifications under adverse operating conditions. 2 The robustness of the sensors is linked, on the one hand, to their ability to withstand mechanical shocks, stresses, or vibrations. On the other hand, it is related the chemical stability of the selective layer in the operating environment. The variety of exceptional physicochemical properties of diamond materials are generally extremely resilient to chemical degradation. They also feature outstanding mechanical properties, such as a high Young's RSC Nanoscience & Nanotechnology No.

show abstract

“…Recently, a new generation of gas sensors based on a change of surface conductivity of H-terminated intrinsic diamond upon the gas adsorption has been introduced with different sensor designs. 10,11 Our group has demonstrated that interdigitated electrodes (IDE) capped with nanostructured H-NCD are highly sensitive and selective to phosgene gas that dissolves in the surface adsorbate layer and increases surface conductivity of H-terminated diamond. 12,13 Such sensors are, in general, structurally, chemically, and electronically complex systems, and it is not straightforward to distinguish particular contributions of their overall electric response.…”

Section: ■ Introductionmentioning

confidence: 99%

Sensitivity of Diamond-Capped Impedance Transducer to Tröger’s Base Derivative

Stehlík

Ižák

Kromka

et al. 2012

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Sensitivity of an intrinsic nanocrystalline diamond (NCD) layer to naphthalene Tröger's base derivative decorated with pyrrole groups (TBPyr) was characterized by impedance spectroscopy. The transducer was made of Au interdigitated electrodes (IDE) with 50 μm spacing on alumina substrate which were capped with the NCD layer. The NCD-capped transducer with H-termination was able to electrically distinguish TBPyr molecules (the change of surface resistance within 30-60 kΩ) adsorbed from methanol in concentrations of 0.04 mg/mL to 40 mg/mL. An exponential decay of the surface resistance with time was observed and attributed to the readsorption of air moisture after methanol evaporation. After surface oxidation the NCD cap layer did not show any leakage due to NCD grain boundaries. We analyzed electronic transport in the transducer and propose a model for the sensing mechanism based on surface ion replacement.

show abstract

Chemical gases sensing properties of diamond nanocone arrays formed by plasma etching

Cited by 31 publications

References 22 publications

Gas sensing properties of nanocrystalline diamond at room temperature

Gas sensing properties of nanocrystalline diamond at room temperature

Diamond-based Resonators for Chemical Detection

Sensitivity of Diamond-Capped Impedance Transducer to Tröger’s Base Derivative

Contact Info

Product

Resources

About