Highly efficient thermophones based on freestanding single-walled carbon nanotube films

Romanov, Stepan A.; Aliev, Ali E.; Fine, Boris V.; Anisimov, Anton S.; Nasibulin, Albert G.

doi:10.1039/c9nh00164f

Cited by 38 publications

(34 citation statements)

References 18 publications

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“…Recently, the fusion of materials science and modern digital technologies, including robotics, cloud computing, and artificial intelligence (AI), has increasingly attracted researcher attention. Software-controlled chemical equipment is widely utilized in laboratories as powerful tools for the automated synthesis of target molecules 1,2 , polymers 3 , quantum dots (QDs) 4,5 , and 2-D materials 6 . These highthroughput automatic tools, which combined with in situ characterization methods, have significantly enhanced the efficiency and reproducibility of material synthesis.…”

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confidence: 99%

Autonomous discovery of optically active chiral inorganic perovskite nanocrystals through an intelligent cloud lab

et al. 2020

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We constructed an intelligent cloud lab that integrates lab automation with cloud servers and artificial intelligence (AI) to detect chirality in perovskites. Driven by the materials acceleration operating system in cloud (MAOSIC) platform, on-demand experimental design by remote users was enabled in this cloud lab. By employing artificial intelligence of things (AIoT) technology, synthesis, characterization, and parameter optimization can be autonomously achieved. Through the remote collaboration of researchers, optically active inorganic perovskite nanocrystals (IPNCs) were first synthesized with temperature-dependent circular dichroism (CD) and inversion control. The inter-structure (structural patterns) and intrastructure (screw dislocations) dual-pattern-induced mechanisms detected by MAOSIC were comprehensively investigated, and offline theoretical analysis revealed the thermodynamic mechanism inside the materials. This self-driving cloud lab enables efficient and reliable collaborations across the world, reduces the setup costs of in-house facilities, combines offline theoretic analysis, and is practical for accelerating the speed of material discovery.

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confidence: 99%

Autonomous discovery of optically active chiral inorganic perovskite nanocrystals through an intelligent cloud lab

et al. 2020

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“…However, it does not guarantee good reliable results, as was shown by Barnes et al, where an agreement with an experimental absorption spectrum was demonstrated only within 20%. 15 Besides, the AFM methods are not applicable in the case of freestanding films used in ultrasensitive photodetectors, 5 efficient ultrasound loudspeakers, 36 and extreme UV protective membranes, 37 which makes the preliminary thickness assessment a difficult (or even impossible) task. Another approach proposed by Kuwahara et al 38 is based on thick film optical constants applied as a reference for thin films.…”

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confidence: 99%

Express determination of thickness and dielectric function of single-walled carbon nanotube films

Ermolaev

Tsapenko

Volkov

et al. 2020

Applied Physics Letters

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Single-walled carbon nanotube (SWCNT) films are promising building blocks for diversified applications in electronics, photovoltaics, and photonics. However, their electrical and optical engineering is still a challenging task owing to multiple obstacles, including the absence of fast and easy-to-use methods for the determination of SWCNT film properties. Here, we present a rapid, contactless, and universal technique for accurate estimation of both SWCNT film thicknesses and their dielectric functions. The approach combines broadband optical absorbance and highly sensitive spectroscopic ellipsometry measurements. The observed linear dependence of the film thickness on its absorbance at 550 nm provides a time-effective and contactless method of thickness assignment, which is of significant importance to the practical implementation of SWCNT films in optoelectronic devices. Additionally, our approach revealed that a simple procedure of film densification allows to controllably alter the dielectric response by at least 40% and, thus, to add extra fine-tuning capabilities during material property engineering. Therefore, this express technique as a whole offers an advanced metrological tool for current and next-generation SWCNT-based devices.

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“…In Figure , normalized SPL (1 cm, 1W/cm 2 ) of different TA devices have been listed. − ,,,− Compared with other materials, graphene has the smallest thickness and an extremely low HCPUA of 5.8 × 10 –4 J × m –2 × K –1 , 1 order of magnitude smaller than monolayer CNT thin films. , Therefore, the normalized SPL of GTASS has the good performance. In 2011, Tian et al .…”

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confidence: 99%

Graphene-Based Thermoacoustic Sound Source

Qiao

Gou

et al. 2020

ACS Nano

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Thermoacoustic (TA) effect has been discovered for more than 130 years. However, limited by the material characteristics, the performance of a TA sound source could not be compared with magnetoelectric and piezoelectric loudspeakers. Recently, graphene, a two-dimensional material with the lowest heat capacity per unit area, was discovered to have a good TA performance. Compared with a traditional sound source, graphene TA sound sources (GTASSs) have many advantages, such as small volume, no diaphragm vibration, wide frequency range, high transparency, good flexibility, and high sound pressure level (SPL). Therefore, graphene has a great potential as a next-generation sound source. Photoacoustic (PA) imaging can also be applied to the diagnosis and treatment of diseases using the photothermo-acoustic (PTA) effect. Therefore, in this review, we will introduce the history of TA devices. Then, the theory and simulation model of TA will be analyzed in detail. After that, we will talk about the graphene synthesis method. To improve the performance of GTASSs, many strategies such as lowering the thickness and using porous or suspended structures will be introduced. With a good PTA effect and large specific area, graphene PA imaging and drug delivery is a promising prospect in cancer treatment. Finally, the challenges and prospects of GTASSs will be discussed.

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Highly efficient thermophones based on freestanding single-walled carbon nanotube films

Abstract: We present the state-of-the-art performance of air-coupled thermophones made of thin, freestanding films of randomly oriented single-walled carbon nanotubes (SWCNTs).

Cited by 38 publications

References 18 publications

Autonomous discovery of optically active chiral inorganic perovskite nanocrystals through an intelligent cloud lab

Autonomous discovery of optically active chiral inorganic perovskite nanocrystals through an intelligent cloud lab

Express determination of thickness and dielectric function of single-walled carbon nanotube films

Graphene-Based Thermoacoustic Sound Source

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