Design and development of carbon nanotube-based microbolometer for IR imaging applications

Sood, Ashok K.; Egerton, E. James; Puri, Yash R.; Fernandes, Gustavo E.; Xu, Jimmy; Akturk, Akin; Goldsman, N.; Dhar, Nibir K.; Dubey, Madan; Wijewarnasuriya, P. S.; Lineberry, Bobby I.

doi:10.1117/12.923020

Cited by 2 publications

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“…Fernandes et al reported the TCR of a CNT-polymer composite can reach −40% K −1 [15]. Sood et al expected that the CNT film could be a thermal sensitive material for the next generation infrared detector owing to its lower thermal mass and higher infrared absorption coefficient [16].…”

Section: Introductionmentioning

confidence: 99%

Percolation-amplified infrared sensitivity in titanium oxide-multi-walled carbon nanotube composite films

Liang

Zhou

et al. 2019

Nanotechnology

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Titanium dioxide (TiO2)-multi-walled carbon nanotube (MWCNT) thin films were prepared and studied systematically for the effects of the concentration of MWCNTs on the electro-optical properties. Result shows that the addition of MWCNTs not only improves the optical absorption and electrical conductivity, but also reduces the 1/f noise of the films. Percolation phenomenon is observed at MWCNT concentrations of 0.20–0.25 wt%. In this concentration range, the composite films exhibit an abrupt rise of the temperature coefficient of resistance value (−2.93% K−1) and large general thermal parameter, both of which are desirable for applications in uncooled infrared detectors.

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Section: Introductionmentioning

confidence: 99%

Percolation-amplified infrared sensitivity in titanium oxide-multi-walled carbon nanotube composite films

Liang

Zhou

et al. 2019

Nanotechnology

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“…Carbon nanotubes (CNTs), which like graphene are allotropes of carbon, may be considered formed of hexagonal sheets of graphene rolled into cylinders (Figure 3). CNTs exhibit bandgaps in the range of zero to ~2 eV, and demonstrate metallic or semiconducting behavior depending mainly on their diameter and orientation of the hexagonal graphene structure along the axis of the tube (armchair, zigzag, or chiral) as illustrated in Figure 3(a) [13]. CNTs can exhibit exceptional conductivity, and as a result have found application in nanoscale FETs that have enabled novel devices including intermolecular logic gates [5].…”

Section: Carbon Nanotube-based Microbolometers For Ir Imaging 21 Promentioning

confidence: 99%

“…As their names suggest, SWCNTs comprise single sheets of graphene for the outer walls, while MWCNTs are composed of multiple overlapping sheets of graphene rolled up in cylindrical forms. The lengths of SWCNTs are usually in the 50-300 nm range (though up to centimeter lengths are possible) with typical diameters of 1-2 nm, while diameters of MWCNTs can exceed 100 nm [13].…”

Section: Carbon Nanotube-based Microbolometers For Ir Imaging 21 Promentioning

confidence: 99%

“…The adaption of SWCNTs to CMOS process technologies has demonstrated the potential for very small pixel sizes with sufficient yields [13]. In addition, there is evidence that unlike devices using VOx and amorphous Si, SWCNT-based microbolometers are not limited in performance due to the 1/f noise floor [14].…”

Section: Cnt-based Microbolometer Pixelsmentioning

confidence: 99%

“…(b) Structure of MWCNTs made up of two concentric shells. (c) MWCNTs composed of many overlapping shells[13].…”

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Nanostructure Technology for EO/IR Detector Applications

Sood¹,

Zeller²,

Pethuraja³

et al. 2020

Nanorods and Nanocomposites

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This chapter covers recent advances in the development of nanostructurebased material technologies to benefit next-generation electro-optical (EO) and infrared (IR) sensor and imager applications. Nanostructured materials can now be integrated into a variety of technological platforms, offering novel optoelectrical properties that greatly enhance device performance in many practical applications. Use of novel carbon nanotube (CNT) based materials has enabled new approaches for applying nanostructure design methodologies that can offer enhanced performance for low-cost bolometers for IR detection and imaging applications. We will discuss the development of carbon nanostructure based infrared detectors and arrays, including concepts that will provide high performance, high frame rate, and uncooled microbolometers for mid-wave infrared (MWIR) and long-wave infrared (LWIR) band detection. In addition, nanostructured antireflection (AR) coatings are being developed that significantly enhance transmission over a broad spectrum, providing substantial improvements in device performance compared to conventional thin film AR coatings. These nanostructured AR coatings have been demonstrated over visible to LWIR spectral bands on various substrates. In this chapter, we discuss both theoretical and measured results of these diverse nanostructure technologies to advance sensing performance over a wide range of spectral bands for defense, space, and commercial applications.

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Design and development of carbon nanotube-based microbolometer for IR imaging applications

Cited by 2 publications

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Percolation-amplified infrared sensitivity in titanium oxide-multi-walled carbon nanotube composite films

Percolation-amplified infrared sensitivity in titanium oxide-multi-walled carbon nanotube composite films

Nanostructure Technology for EO/IR Detector Applications

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