Extensive reduction of graphene oxide on thin polymer substrates by ultrafast laser for robust flexible sensor applications

Sharif, Ayesha; Farid, Nagy A.; Collins, Adam R.; Jilani, Asim; O’Connor, Gerard M.

doi:10.1016/j.apsusc.2022.156067

Cited by 14 publications

(4 citation statements)

References 73 publications

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“…The diffraction peak of rGO could not be found, which might be due to the fact that the insertion of Cu 2 O led to a decrease in the interlayer spacing of graphite and prevented GO re-accumulation [ 34 ]. Raman spectra were carried out to verify the effective reduction of GO into rGO, as shown in Figure 2 c. The analysis showed that the intensity ratios ( I D / I G ) in Cu 2 O@rGO (1.03) are far higher than those in GO (0.91), suggesting the formation of more sp 3 defects [ 35 , 36 , 37 , 38 ].…”

Section: Resultsmentioning

confidence: 99%

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A Photochemically Active Cu2O Nanoparticle Endows Scaffolds with Good Antibacterial Performance by Efficiently Generating Reactive Oxygen Species

He,

Zan,

et al. 2024

Nanomaterials

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Cuprous oxide (Cu2O) has great potential in photodynamic therapy for implant-associated infections due to its good biocompatibility and photoelectric properties. Nevertheless, the rapid recombination of electrons and holes weakens its photodynamic antibacterial effect. In this work, a new nanosystem (Cu2O@rGO) with excellent photodynamic performance was designed via the in situ growth of Cu2O on reduced graphene oxide (rGO). Specifically, rGO with lower Fermi levels served as an electron trap to capture photoexcited electrons from Cu2O, thereby promoting electron-hole separation. More importantly, the surface of rGO could quickly transfer electrons from Cu2O owing to its excellent conductivity, thus efficiently suppressing the recombination of electron-hole pairs. Subsequently, the Cu2O@rGO nanoparticle was introduced into poly-L-lactic acid (PLLA) powder to prepare PLLA/Cu2O@rGO porous scaffolds through selective laser sintering. Photochemical analysis showed that the photocurrent of Cu2O@rGO increased by about two times after the incorporation of GO nanosheets, thus enhancing the efficiency of photogenerated charge carriers and promoting electron-hole separation. Moreover, the ROS production of the PLLA/Cu2O@rGO scaffold was significantly increased by about two times as compared with that of the PLLA/Cu2O scaffold. The antibacterial results showed that PLLA/Cu2O@rGO possessed antibacterial rates of 83.7% and 81.3% against Escherichia coli and Staphylococcus aureus, respectively. In summary, this work provides an effective strategy for combating implant-related infections.

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Section: Resultsmentioning

confidence: 99%

“…Raman spectra were carried out to verify the effective reduction of GO into rGO, as shown in Figure 2c. The analysis showed that the intensity ratios (ID/IG) in Cu2O@rGO (1.03) are far higher than those in GO (0.91), suggesting the formation of more sp 3 defects [35][36][37][38].…”

Section: Microstructure Of the Synthesized Nanoparticlesmentioning

confidence: 94%

A Photochemically Active Cu2O Nanoparticle Endows Scaffolds with Good Antibacterial Performance by Efficiently Generating Reactive Oxygen Species

He,

Zan,

et al. 2024

Nanomaterials

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“…These results highlight the potential applications of self-powered triboelectric pressure sensors for health monitoring and human machine interaction. Furthermore, an increasing number of studies have focused on the application of press/stress sensors [123,124], gas sensors [125][126][127], temperature sensors [128,129], etc. These studies focus on utilizing femtosecond laser processing to enhance the performance of a single sensor in terms of sensing sensitivity, application range, and long-term stability.…”

Section: Flexible Wearable Sensorsmentioning

confidence: 99%

Femtosecond Laser Direct Writing of Flexible Electronic Devices: A Mini Review

Wang,

Yang,

Deng

et al. 2024

Materials

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By virtue of its narrow pulse width and high peak power, the femtosecond pulsed laser can achieve high-precision material modification, material additive or subtractive, and other forms of processing. With additional good material adaptability and process compatibility, femtosecond laser-induced application has achieved significant progress in flexible electronics in recent years. These advancements in the femtosecond laser fabrication of flexible electronic devices are comprehensively summarized here. This review first briefly introduces the physical mechanism and characteristics of the femtosecond laser fabrication of various electronic microdevices. It then focuses on effective methods of improving processing efficiency, resolution, and size. It further highlights the typical progress of applications, including flexible energy storage devices, nanogenerators, flexible sensors, and detectors, etc. Finally, it discusses the development tendency of ultrashort pulse laser processing. This review should facilitate the precision manufacturing of flexible electronics using a femtosecond laser.

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“…[27][28][29] For example, wearable sensors can detect human health in a timely manner and allow for health assessment and disease diagnosis anywhere, anytime. [30][31][32][33] Fiber-based electronic materials are the most fundamental component of wearable electronics, as the one-dimensional shape of fibers makes them easier to integrate into wearable devices and exhibit excellent structural flexibility. 34,35 In addition, good mechanical properties, such as a large strain range, high toughness and ultra-ruggedness, are essential for their use as basic sensing units.…”

Section: Introductionmentioning

confidence: 99%

Flexible coaxial composite fiber based on carbon nanotube and thermochromic particles for multifunctional sensor and wearable electronics

et al. 2023

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Extensive reduction of graphene oxide on thin polymer substrates by ultrafast laser for robust flexible sensor applications

Cited by 14 publications

References 73 publications

A Photochemically Active Cu2O Nanoparticle Endows Scaffolds with Good Antibacterial Performance by Efficiently Generating Reactive Oxygen Species

A Photochemically Active Cu2O Nanoparticle Endows Scaffolds with Good Antibacterial Performance by Efficiently Generating Reactive Oxygen Species

Femtosecond Laser Direct Writing of Flexible Electronic Devices: A Mini Review

Flexible coaxial composite fiber based on carbon nanotube and thermochromic particles for multifunctional sensor and wearable electronics

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