High Resolution Surface Imaging Using a Carbon Nanotube Array with Pointed Height distribution


Autoria(s): Mahapatra, D Roy; Anand, SV; Sinha, N; Melnik, RVN
Contribuinte(s)

Laudon, M

Romanowicz, B

Data(s)

2009

Resumo

In this paper we discuss a new technique to image the surfaces of metallic substrates using field emission from a pointed array of carbon nanotubes (CNTs). We consider a pointed height distribution of the CNT array under a diode configuration with two side gates maintained at a negative potential to obtain a highly intense beam of electrons localized at the center of the array. The CNT array on a metallic substrate is considered as the cathode and the test substrate as the anode. Scanning the test Substrate with the cathode reveals that the field emission current is highly sensitive to the surface features with nanometer resolution. Surface features of semi-circular, triangular and rectangular geometries (projections and grooves) are considered for simulation. This surface scanning/mapping technique can be applied for surface roughness measurements with nanoscale accuracy. micro/nano damage detection, high precision displacement sensors, vibrometers and accelerometers. among other applications.

Formato

application/pdf

Identificador

http://eprints.iisc.ernet.in/25468/1/20.pdf

Mahapatra, D Roy and Anand, SV and Sinha, N and Melnik, RVN (2009) High Resolution Surface Imaging Using a Carbon Nanotube Array with Pointed Height distribution. In: Nanotech 2009 Conference, MAY 03-07, 2009, Houston, pp. 310-313.

Publicador

Taylore and Francis

Relação

http://www.nsti.org/Nanotech2009/abs.html?i=1224

http://eprints.iisc.ernet.in/25468/

Palavras-Chave #Aerospace Engineering (Formerly, Aeronautical Engineering)
Tipo

Conference Paper

PeerReviewed