Field emission from nanodiamond grown with ‘ridge’ type geometrically enhanced features

Raina, Supil; Kang, W.P.; Davidson, J.L.

doi:10.1016/j.diamond.2007.12.012

Cited by 26 publications

(24 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 3(b) shows the 'ridge' like microstructure of the nanodiamond film of each UME, see inset. Material characterization using Raman spectroscopy and X-ray Photoelectron Spectroscopy (XPS) and vacuum field emission studies from a similar planar nanodiamond film have been reported previously (24)(25). …”

Section: Sem Characterizationmentioning

confidence: 99%

Electrochemical Biosensor Utilizing Nitrogen Incorporated Nanodiamond Ultra-Microelectrode Array

et al. 2010

Self Cite

View full text Add to dashboard Cite

A nitrogen incorporated nanodiamond ultra-microelectrode array was fabricated using silicon microfabrication technology and microwave PECVD process. 400 ultra-microelectrodes, which are arranged in a square array, project above the surrounding plane of the SiO 2 insulation layer. Each ultra-microelectrode has a radius of 5µm and a spacing of 100µm, in order to avoid an overlap of individual diffusion layers. Dopamine (DA), which is an important catecholamine neurotransmitter, can be detected by the UMEA using steady state cyclic voltammetry with a linear dynamic range of 100µM-1mM. Even though Ascorbic acid (AA) interferes with DA detection under real physiological conditions, we are able to extract the calibration curve for different DA concentrations in the presence of 1mM AA without the need of any surface modification.

show abstract

Section: Sem Characterizationmentioning

confidence: 99%

Electrochemical Biosensor Utilizing Nitrogen Incorporated Nanodiamond Ultra-Microelectrode Array

et al. 2010

Self Cite

View full text Add to dashboard Cite

show abstract

“…The UME has a 'donut' shape, with a thick and raised edge and a slightly recessed part in the middle, as seen in the inset of figure 2(b). Material characterization using Raman spectroscopy and Xray Photoelectron Spectroscopy of the nanodiamond film have been reported previously [33][34]. …”

Section: Ultramicroelectrode Array Fabricationmentioning

confidence: 99%

High temporal resolution electrochemical biosensor using nitrogen-incorporated nanodiamond ultra-microelectrode array

et al. 2012

View full text Add to dashboard Cite

Biosensors for detecting/measuring/monitoring the concentration of neurotransmitters that vary at sub-second timescale can be achieved by using an electrode with high temporal resolution and fast electron transfer kinetics. Neurotransmitters, such as dopamine, undergo rapid fluctuations in concentrations occurring at a sub-second time scale. Real-time monitoring and measurement of these concentration changes, in-vivo or in-vitro, requires the use of ultra-microelectrode array (UMEA). This work reports on the development of a reliable UMEA electrochemical biosensor which can be used to identify, quantify, and monitor essential bio-analytes such as dopamine (DA), ascorbic acid (AA) and uric acid (UA) by using CVD nitrogen-incorporated nanodiamond UMEA without the need of electrode surface functionalization or modifications, making real-time detection possible. The application of fast-scan voltammetry (FSCV) for detecting dopamine and interfering bio-chemicals, including ascorbic acid and uric acid in 0.1M PBS (pH 7.4) by the UMEA has been realized. The detailed experiential method for the sensor array fabrication, and the UMEA sensitivity, selectivity, and detection limit for the detection of bio-analytes will be discussed.

show abstract

“…Electron emission current was then observed at cathode temperatures ranging from 500 o C to 900 o C at varying applied anode voltages. This data was analyzed to predict the expected emission current at 0 applied field by utilizing the Schottky equation [3] which describes the change in thermionic emission current influenced by an applied field F as: (2) where and e and are the electron charge and the permittivity of free space respectively.…”

Section: Experimental Approachmentioning

confidence: 99%

“…The preparation of the silicon substrates for deposition and the growth process have been described elsewhere [2].…”

Section: Experimental Approachmentioning

confidence: 99%

P2.14: Characterization of the thermionic electron emission properties of nitrogen-incorporated “ridged” nanodiamond for use in thermal energy conversion

Paxton

Wisitsoraat

Raina

et al. 2010

International Vacuum Nanoelectronics Conference

Self Cite

View full text Add to dashboard Cite

show abstract

Field emission from nanodiamond grown with ‘ridge’ type geometrically enhanced features

Cited by 26 publications

References 11 publications

Electrochemical Biosensor Utilizing Nitrogen Incorporated Nanodiamond Ultra-Microelectrode Array

Electrochemical Biosensor Utilizing Nitrogen Incorporated Nanodiamond Ultra-Microelectrode Array

High temporal resolution electrochemical biosensor using nitrogen-incorporated nanodiamond ultra-microelectrode array

P2.14: Characterization of the thermionic electron emission properties of nitrogen-incorporated “ridged” nanodiamond for use in thermal energy conversion

Contact Info

Product

Resources

About

Field emission from nanodiamond grown with ‘ridge’ type geometrically enhanced features

Cited by 26 publications

References 11 publications

Electrochemical Biosensor Utilizing Nitrogen Incorporated Nanodiamond Ultra-Microelectrode Array

Electrochemical Biosensor Utilizing Nitrogen Incorporated Nanodiamond Ultra-Microelectrode Array

High temporal resolution electrochemical biosensor using nitrogen-incorporated nanodiamond ultra-microelectrode array

P2.14: Characterization of the thermionic electron emission properties of nitrogen-incorporated &#x201C;ridged&#x201D; nanodiamond for use in thermal energy conversion

Contact Info

Product

Resources

About

P2.14: Characterization of the thermionic electron emission properties of nitrogen-incorporated “ridged” nanodiamond for use in thermal energy conversion