Wet deposition of carbon nanotube black coatings for stray light reduction in optical systems

Azoubel, Suzanna; Cohen, R.; Magdassi, Shlomo

doi:10.1016/j.surfcoat.2014.11.063

Cited by 33 publications

(25 citation statements)

References 19 publications

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“…The complete elucidation of the physical structure of carbon nanotubes is largely credited to Iijima's work, which characterized them by detailed scanning electron microscopy (SEM) images. Shortly thereafter, theoretical work by several groups determined that CNTs have unique and diverse intrinsic properties, including electrical, thermal, and optical properties (Bethune et al 1993;Dalton et al 2003;Azoubel et al 2015). Since then, researches and a better understanding of this material have led to efforts in the search for potential applications of carbon nanotubes (Campos et al 2017;Han et al 2019;Xu et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Production and Applications of Carbon Nanotube Buckypapers

Campos

Rocha

Camargo

2020

J.Aerosp. Technol. Manag.

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The present work aimed to prepare and characterize carbon nanotube (CNT) buckypapers (BPs) and to provide a perspective on possible applications in the optical device industry and power generation through triboelectric nanogenerators. The CNTs were dispersed in aqueous solution with the aid of a dispersing agent and then vacuum filtered. The prepared buckypaper has low average optical reflectance and shows an improvement in electrical conductivity and power generation when silver nanowires were added. This material includes new horizons and future applications for carbon nanotube buckypapers,including aerospace applications.

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Section: Introductionmentioning

confidence: 99%

Production and Applications of Carbon Nanotube Buckypapers

Campos

Rocha

Camargo

2020

J.Aerosp. Technol. Manag.

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“…Good performance for optical devices, regardless of their complexity, is a very important issue seriously affected by stray light or “optical noise.” The effect of optical noise in systems may vary from low performance to physical damage and finally fracture. Stray light can not be totally eliminated; however, it can often be reduced to an acceptable level by using a properly designed mechanical system or/and by applying performable black coatings equipped with effective black pigments …”

Section: Introductionmentioning

confidence: 99%

“…Stray light can not be totally eliminated; however, it can often be reduced to an acceptable level by using a properly designed mechanical system or/and by applying performable black coatings equipped with effective black pigments. [3][4][5][6][7][8][9][10] Coatings with ultra-high absorptance black pigments are of dominant importance in the designed devices used for performance in UV/vis/NIR spectral regions. These coatings are really applicable to increase the absorptance of thermal control coatings and to stop the unwanted reflections and scattering in optical devices where the minimal optical noise is critical.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and evaluation of several high absorbance black pigments for spacecraft thermal control coatings

Kiomarsipour

Ghasemi

Ghani

2019

Color Research & Application

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Using black coatings and materials with high light absorbance that are capable of absorbing photons at visible and longer wavelengths is a very effective way to reduce unwanted stray light, also known as optical noise, within optical equipment. These lights can be greatly reduced to a reasonable level by functional and performable black coatings that are modified to absorb incident light as much as possible by their specific pigments. In the present work, several carbonaceous pigments were synthesized for the first time from wasteful materials and their optical properties in the visible and near‐infrared ranges studied. First, MCM‐48 and SBA‐15 were synthesized at different conditions and were then used as templates for carbonaceous products. SSS‐1 (the carbonic pigment synthesized by the mixture of sucrose and sodium silicate), SSS‐2 (the carbonic pigment synthesized by the mixture of sawdust and sodium silicate), and mesoporous carbon pigments (CMK‐3 and CMK‐1 with different levels of saturations) were synthesized. Finally, their structure, morphology, and optical properties were investigated by X‐ray diffraction (XRD), Field Emission Scanning Electron Microscopy (FE‐SEM), and Diffuse Reflectance Spectroscopy (DRS). The results indicated that the SSS‐1 pigment had a lower reflectance (below 1%) than carbon black (about 2.5%) in the visible region despite it being more cost‐effective than carbon black. The mesoporous pigments showed very high light absorbance in the visible region (about 2.5%). Compared with other black pigments, the CMK‐1 was the blackest synthesized material with a very low reflectance (about 0.05% in visible region), making it an ideal candidate as a super black pigment for reducing unwanted stray light within optical equipment.

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“…Replacement of conventional spacecraft structural materials (composites and metal) with advanced composites derived from low‐density high‐strength CNTs can greatly reduce spacecraft weight . Extremely black materials made by CNTs can greatly suppress stray and scattered light in space‐borne optical instruments, which is important for achieving the design performance of the instrument . But in all these applications above, the CNT‐based materials have to be exposed in space environments and suffer extreme space environments.…”

Section: Introductionmentioning

confidence: 99%

Erosion effects of atomic oxygen on carbon nanotube arrays in different incidence direction

Liu

Yang

et al. 2018

Surface & Interface Analysis

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The erosion effects of atomic oxygen (AO) in different incidence direction on carbon nanotube (CNT) arrays have been studied by ground-based AO simulation facility. The surface morphologies and the molecular structures of CNT arrays before and after AO experiments have been characterized by scanning electron microscopy and Raman spectroscopy. It is shown that the morphologies of CNT arrays are quite different from those before AO experiments. It is presented that both bombardment effect and the oxidation effect of AO will contribute to the erosion effects on CNT arrays. Carbon nanotube arrays will be etched away in AO environment, but the AO erosion yield of CNT arrays is different with different AO incidence direction. It is proposed that the density of CNT-based material may also affect the erosion yield. KEYWORDS atomic oxygen, bombardment effect, carbon nanotube arrays, erosion effects, oxidation effect 1 | INTRODUCTION Because of their unique properties of extremely high strength, high stiffness, low density, good chemical stability, and high thermal and electrical conductivities, carbon nanotubes (CNTs) will have great potential applications in many fields. Particularly in space applications, the potential implementations of these advanced materials have been predicted to have a large impact on future spacecraft. 1 Carbon nanotube-based materials can be used for electromagnetic interference shielding and electrostatic discharge protection on spacecraft. 2,3 Extremely sensitive chemical sensors based on CNTs are suitable for detecting trace amounts of residual atmosphere in space. 4,5 Replacement of conventional spacecraft structural materials (composites and metal) with advanced composites derived from lowdensity high-strength CNTs can greatly reduce spacecraft weight. 6-9Extremely black materials made by CNTs can greatly suppress stray and scattered light in space-borne optical instruments, which is important for achieving the design performance of the instrument. 10-14 But in all these applications above, the CNT-based materials have to be exposed in space environments and suffer extreme space environments.Atomic oxygen (AO) is one of the predominant species in low earth orbit (LEO), which is formed by photodissociation of the residual diatomic oxygen that is exposed to the sun's ultraviolet radiation. [15][16][17] As a highly reactive form of oxygen, AO has sufficient kinetic energy of about 5 eV to break chemical bonds. As a result, AO can interact readily with many materials on spacecraft, which are exposed to the space directly. Specially, all hydrocarbon-based polymers and graphite would be easily oxidized and eroded, which lead to degradation in performance of these materials. [18][19][20] So AO is a great threat to the durability and reliability of spacecraft components. In development of new materials intended for operation in aerospace in LEO, such as CNT-based materials, one of the most important problems is the assurance of their resistance against the impact of the AO.A few studies had been co...

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Wet deposition of carbon nanotube black coatings for stray light reduction in optical systems

Cited by 33 publications

References 19 publications

Production and Applications of Carbon Nanotube Buckypapers

Production and Applications of Carbon Nanotube Buckypapers

Synthesis and evaluation of several high absorbance black pigments for spacecraft thermal control coatings

Erosion effects of atomic oxygen on carbon nanotube arrays in different incidence direction

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