<i>In situ</i> monitoring of electrical and optoelectronic properties of suspended graphene ribbons during laser-induced morphological changes

Zhang, Xiaosi; Walmsley, Thayer S.; Xu, Ya‐Qiong

doi:10.1039/d0na00413h

Cited by 3 publications

(2 citation statements)

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“…Laser welding, on the other hand, allows for the creation of strong joints without the need for additional materials, making it a valuable process in the production of aviation and aerospace systems [24][25][26]. The application of lasers in interaction with smart materials opens the door to more innovative and adaptable technologies, such as the development of intelligent products capable of modifying their properties through laser manipulation [27][28][29]. These fields are continuously advancing, and forthcoming progress in these areas could result in a broad spectrum of practical applications.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Smart Materials Using Laser Processing: Analysis and Prospects

Murzin,

Stiglbrunner

2023

Applied Sciences

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Laser processing is a versatile tool that enhances smart materials for diverse industries, allowing precise changes in material properties and customization of surface characteristics. It drives the development of smart materials with adaptive properties through laser modification, utilizing photothermal reactions and functional additives for meticulous control. These laser-processed smart materials form the foundation of 4D printing that enables dynamic shape changes depending on external influences, with significant potential in the aerospace, robotics, health care, electronics, and automotive sectors, thus fostering innovation. Laser processing also advances photonics and optoelectronics, facilitating precise control over optical properties and promoting responsive device development for various applications. The application of computer-generated diffractive optical elements (DOEs) enhances laser precision, allowing for predetermined temperature distribution and showcasing substantial promise in enhancing smart material properties. This comprehensive overview explores the applications of laser technology and nanotechnology involving DOEs, underscoring their transformative potential in the realms of photonics and optoelectronics. The growing potential for further research and practical applications in this field suggests promising prospects in the near future.

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Section: Introductionmentioning

confidence: 99%

Fabrication of Smart Materials Using Laser Processing: Analysis and Prospects

Murzin,

Stiglbrunner

2023

Applied Sciences

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“…Cao et al 12 developed a method to curl GNRs by thermal annealing and Jarrari et al 13 used this method to show that curled GNRs enhance photocurrent responses. Methods previously developed to bend and twist nanotubes 33 or induce, by laser, changes in GNRs, 34 might be useful to produce TGNRs.…”

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confidence: 99%

Twisting or untwisting graphene twisted nanoribbons without rotation

Fonseca

2021

Phys. Rev. B

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Graphene nanoribbons (GNRs) have the most of the outstanding properties of pristine graphene plus non-null bandgap 1-3 . Besides width-and edge-dependent, GNR band-gap and other electronic properties were shown to change with the application of twisting along its axis 4-10 . Twisted GNRs (TGNRs) have already been produced 11-13 , but it remains a challenge to control and fine-tune their amount of torsional strain. Here, based on the strong adhesion between graphene layers 14,15 , I proposed a new way to change the amount of twist in a TGNR without rotating its extremities. By laying the extremities of a TGNR on two separate substrates and controlling the distance between them, I show by computational simulations that the total twist of the TGNR can be continuously varied within a certain interval. This happens because of a topological constraint imposed by the substrates on the geometric structure of the TGNR, leading to a new kind of twist-to-writhe conversion (TWC), well-known to happen in twisted structures, from DNA to marine cables 16-21 . Regular TWC is controlled by applying tension or changing the end-to-end distance of the filament 22,23 , while this new substrate induced TWC phenomenon relies only on the interactions between the TGNR and substrate. Possible applications are suggested.Electronic [7][8][9][10][11]24,25 , mechanical [26][27][28][29] and thermal [30][31][32] properties of TGNRs make them promising and versatile nanostructures for diverse applications. However, only few

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In pursuit of degenerative brain disease diagnosis: Dementia biomarkers detected by DNA aptamer-attached portable graphene biosensor

Bodily,

Ramanathan,

Wei

et al. 2023

Proc. Natl. Acad. Sci. U.S.A.

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Dementia is a brain disease which results in irreversible and progressive loss of cognition and motor activity. Despite global efforts, there is no simple and reliable diagnosis or treatment option. Current diagnosis involves indirect testing of commonly inaccessible biofluids and low-resolution brain imaging. We have developed a portable, wireless readout-based Graphene field-effect transistor (GFET) biosensor platform that can detect viruses, proteins, and small molecules with single-molecule sensitivity and specificity. We report the detection of three important amyloids, namely, Amyloid beta (Aβ), Tau (τ), and α-Synuclein (αS) using DNA aptamer nanoprobes. These amyloids were isolated, purified, and characterized from the autopsied brain tissues of Alzheimer’s Disease (AD) and Parkinson’s Disease (PD) patients. The limit of detection (LoD) of the sensor is 10 fM, 1–10 pM, 10–100 fM for Aβ, τ, and αS, respectively. Synthetic as well as autopsied brain-derived amyloids showed a statistically significant sensor response with respect to derived thresholds, confirming the ability to define diseased vs. nondiseased states. The detection of each amyloid was specific to their aptamers; Aβ, τ, and αS peptides when tested, respectively, with aptamers nonspecific to them showed statistically insignificant cross-reactivity. Thus, the aptamer-based GFET biosensor has high sensitivity and precision across a range of epidemiologically significant AD and PD variants. This portable diagnostic system would allow at-home and POC testing for neurodegenerative diseases globally.

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In situ monitoring of electrical and optoelectronic properties of suspended graphene ribbons during laser-induced morphological changes

Abstract: Exploring ways to tune and improve the performance of graphene is of paramount importance in creating functional graphene-based electronic and optoelectronic devices. Recent advancements have shown that altering the morphology...

Cited by 3 publications

References 43 publications

Fabrication of Smart Materials Using Laser Processing: Analysis and Prospects

Fabrication of Smart Materials Using Laser Processing: Analysis and Prospects

Twisting or untwisting graphene twisted nanoribbons without rotation

In pursuit of degenerative brain disease diagnosis: Dementia biomarkers detected by DNA aptamer-attached portable graphene biosensor

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