Ultrasonic doping and photo-reduction of graphene oxide films for flexible and high-performance electrothermal heaters

Tembei, Sandra A.N.; El-Bab, Ahmed M. R. Fath; Hessein, Amr; El‐Moneim, Ahmed Abd

doi:10.1016/j.flatc.2020.100199

Cited by 14 publications

(4 citation statements)

References 72 publications

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“…Based on this approach, it is estimated that, at a power input of 120 W, an ultrahigh temperature of around 3000 K is reached in the center of the aerogel monolith, an extremely high value close to the melting point of graphitic carbon allotropes . This steady-state core temperature is almost an order of magnitude higher than for many previously reported aerogel heating studies on GO-derived aerogels (Figure i, Table S2, Supporting Information), ,,,,,− mainly due to the high power inputs employed here. It is also worth noting that ultrahigh aerogel heating was achieved here at comparatively low voltage inputs (10 V or lower, Figure i), due to the relatively high graphitic quality and corresponding high electrical conductivity of rGO aerogels (here, σ rGOaeroel = 81 S m –1 ).…”

Section: Resultsmentioning

confidence: 63%

Electrothermal Transformations within Graphene-Based Aerogels through High-Temperature Flash Joule Heating

Xia,

Mannering,

Huang

et al. 2023

J. Am. Chem. Soc.

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Flash Joule heating of highly porous graphene oxide (GO) aerogel monoliths to ultrahigh temperatures is exploited as a low carbon footprint technology to engineer functional aerogel materials. Aerogel Joule heating to up to 3000 K is demonstrated for the first time, with fast heating kinetics (∼300 K•min −1 ), enabling rapid and energy-efficient flash heating treatments. The wide applicability of ultrahigh-temperature flash Joule heating is exploited in a range of material fabrication challenges. Ultrahightemperature Joule heating is used for rapid graphitic annealing of hydrothermal GO aerogels at fast time scales (30−300 s) and substantially reduced energy costs. Flash aerogel heating to ultrahigh temperatures is exploited for the in situ synthesis of ultrafine nanoparticles (Pt, Cu, and MoO 2 ) embedded within the hybrid aerogel structure. The shockwave heating approach enables high through-volume uniformity of the formed nanoparticles, while nanoparticle size can be readily tuned through controlling Jouleheating durations between 1 and 10 s. As such, the ultrahigh-temperature Joule-heating approach introduced here has important implications for a wide variety of applications for graphene-based aerogels, including 3D thermoelectric materials, extreme temperature sensors, and aerogel catalysts in flow (electro)chemistry.

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Section: Resultsmentioning

confidence: 63%

Electrothermal Transformations within Graphene-Based Aerogels through High-Temperature Flash Joule Heating

Xia,

Mannering,

Huang

et al. 2023

J. Am. Chem. Soc.

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“…[ 125 ] Additionally, the N atoms were introduced into the GO lattice in a wet chemical doping phase which added the nitrogen source directly into the GO solution. [ 126 ] The CO 2 laser scanning is used for the removal of oxygen‐containing functional groups and the rearrangement of N atoms in the graphene lattice.…”

Section: Fabrication and Modification Methods Of Ligmentioning

confidence: 99%

Doping of Laser‐Induced Graphene and Its Applications

Zhang

Liu

et al. 2023

Adv Materials Technologies

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Laser‐induced graphene (LIG) has attracted extensive attention owing to its facile preparation of graphene and direct engraving patterns for devices. Various applications are demonstrated such as sensors, supercapacitors, electrocatalysis, batteries, antimicrobial, oil and water separation, solar cells, and heaters. In recent years, doping has been employed as a significant strategy to modulate the properties of LIG and thereby improve the performance of LIG devices. Due to the patternable manufacture, controllable morphologies, and the synergistic effect of doped atoms and graphene, the doped LIG devices exhibit a high sensitivity of sensing, pseudocapacitance performance, and biological antibacterial. This paper reviews the latest novel research progress of heteroatom and nanoparticles doped LIG in synthesis, properties, and applications. The fabrications of LIG and typical doping approaches are presented. Special attention is paid to two doping processes of LIG: the one‐step laser irradiation method and the two‐step laser modification consisting of deposition, drop‐casting, and duplicated laser pyrolysis. Doped LIG applications with improved performance are mainly highlighted. Taking advantage of doped LIG's properties and device performances will provide excellent opportunities for developing artificial intelligence, data storage, energy, health, and environmental applications.

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“…Among the electrothermal carbon materials, the cheap MWCNTs with high electrothermal conversion [ 27 ] have been applied to smart textiles [ 28 ] and electric cable deicing. [ 29 ] Reduced graphene oxide (rGO) has better electrical and thermal conductivity than graphene oxide (GO), [ 30 ] which have been used in electrothermal heaters, [ 31 ] sensors, [ 32 ] electromechanical actuators. [ 33 ] Lately, the mixture of carbon nanotubes and GO or rGO have been reported to restack and reinforce their electrical and thermal conductivity, [ 34 ] because rGO can be an enhanced conductive dispersant when mixed with carbon nanotubes.…”

Section: Introductionmentioning

confidence: 99%

A HiPAD Integrated with rGO/MWCNTs Nano‐Circuit Heater for Visual Point‐of‐Care Testing of SARS‐CoV‐2

Huang

et al. 2021

Adv Funct Materials

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Nowadays, the main obstacle for further miniaturization and integration of nucleic acids point‐of‐care testing devices is the lack of low‐cost and high‐performance heating materials for supporting reliable nucleic acids amplification. Herein, reduced graphene oxide hybridized multi‐walled carbon nanotubes nano‐circuit integrated into an ingenious paper‐based heater is developed, which is integrated into a paper‐based analytical device (named HiPAD). The coronavirus disease 2019 (COVID‐19) pandemic caused by severe acute respiratory syndrome coronavirus 2 (SARS‐CoV‐2) is still raging across the world. As a proof of concept, the HiPAD is utilized to visually detect the SARS‐CoV‐2 N gene using colored loop‐mediated isothermal amplification reaction. This HiPAD costing a few dollars has comparable detection performance to traditional nucleic acids amplifier costing thousands of dollars. The detection range is from 25 to 2.5 × 1010 copies mL−1 in 45 min. The detection limit of 25 copies mL−1 is 40 times more sensitive than 1000 copies mL−1 in conventional real‐time PCR instruments. The disposable paper‐based chip could also avoid potential secondary transmission of COVID‐19 by convenient incineration to guarantee biosafety. The HiPAD or easily expanded M‐HiPAD (for multiplex detection) has great potential for pathogen diagnostics in resource‐limited settings.

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Ultrasonic doping and photo-reduction of graphene oxide films for flexible and high-performance electrothermal heaters

Cited by 14 publications

References 72 publications

Electrothermal Transformations within Graphene-Based Aerogels through High-Temperature Flash Joule Heating

Electrothermal Transformations within Graphene-Based Aerogels through High-Temperature Flash Joule Heating

Doping of Laser‐Induced Graphene and Its Applications

A HiPAD Integrated with rGO/MWCNTs Nano‐Circuit Heater for Visual Point‐of‐Care Testing of SARS‐CoV‐2

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