Direct synthesis of sp-bonded carbon chains on graphite surface by femtosecond laser irradiation

Hu, Anming; Rybachuk, Maksym; Lu, Qing‐Bin; Duley, W. W.

doi:10.1063/1.2793628

Cited by 113 publications

(81 citation statements)

References 23 publications

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“…[98][99][100] Laser ablation (with both fs and ns pulses) of solid carbon targets or suspensions (e.g., fullerenes and nanodiamond) produces solutions of isolated wires in the form of polyynes with an even number of carbon atoms. [101][102][103] An easy-to-use and cost-effective technique for the synthesis of polyynes in solution is the arc discharge in liquids developed by F. Cataldo. 103 This technique also allows one to control the chain termination by selecting suitable solvents.…”

Section: Synthesis and Preparation Of Sp-carbon Systems: A Brief Overmentioning

confidence: 99%

Carbon-atom wires: 1-D systems with tunable properties

et al. 2016

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This review provides a discussion of the current state of research on linear carbon structures and related materials based on sp-hybridization of carbon atoms ( polyynes and cumulenes). We show that such systems have widely tunable properties and thus represent an intriguing and mostly unexplored field for both fundamental and applied sciences. We discuss the rich interplay between the structural, vibrational, and electronic properties focusing on recent advances and the future perspectives of carbon-atom wires and novel hybrid sp-sp 2 -carbon architectures.

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Section: Synthesis and Preparation Of Sp-carbon Systems: A Brief Overmentioning

confidence: 99%

Carbon-atom wires: 1-D systems with tunable properties

et al. 2016

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“…1 Nanojoining is one kind of bottom-up nanofabrications which enables the direct assembly of lowdimensional nanostructures for nanodevices. [2][3][4][5][6][7] It is important to point out that there is an emerging need to join nanoscale building blocks, such as nanoparticles (NPs) and nanowires, to themselves and/or dissimilar nanocomponents and/or molecular-components to form functional nanodevices and systems, and then to join these to the surroundings, to be integrated into micro-and macro-scale devices and systems. [2][3][4][5][6][7] Otherwise, industrial scale production of these nanoscale devices is not possible, as experienced both at macro-and micro-scales.…”

Section: Introductionmentioning

confidence: 99%

“…As the size of nanoparticles reduces, diffusion is enhanced because of lower activation energy and increased specific surface energy, which can result in the decrease of sintering and bonding temperature. 5,15,16 This is important since there is increasing interest in the development of low temperature joining processes for polymeric based microelectronics applications. 6 Ultrasonic nanowelding has been developed to join CNTs to Ti electrodes 17 for the development of carbon nanotube-based photovoltaic cells with high energy conversion efficiency.…”

mentioning

confidence: 99%

“…With the brazed CNT bundles, an incandescent lamp filament can be fabricated with high light emission efficiency due to the much lower contact resistance enabled by active brazing. 23 Fusion nanowelding processes have been attempted with various heat sources, such as laser beam, 5,22 Joule heating 24,25 similar to that used in resistance welding, 1 and even a resistively heated hot stage. 26 The joint is formed by resolidification (fusion) of the molten metal at the faying surfaces produced by Joule heating.…”

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confidence: 99%

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Femtosecond laser welded nanostructures and plasmonic devices

Peng

Alarifi

et al. 2012

Journal of Laser Applications

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Nanojoining, a burgeoning research area, becomes a key manufacturing of complicated nanodevices with functional prefabricated components. In this work, various nanojoining methods are first reviewed. For nanojoining of Ag/Au nanoparticles, three methods are investigated comparatively. Thermal annealing shows a two-step solid state diffusion mechanism. Laser annealing by millisecond pulses displays the thermal activated solid state diffusion. Meanwhile, two effects have been identified in femtosecond laser irradiation with different laser intensities: photofragmentation at rather high intensity (∼1014 W/cm2) and nanojoining at low intensity (∼1010 W/cm2). The photofragmentation forms a large number of tiny nanoparticles with an average size of 10 nm. Control over irradiation conditions at intensities near 1010 W/cm2 results in nanojoining of most of the nanoparticles. This nanojoining is obtained through a nonthermal melting and a surface fusion welding. Joined Au nanoparticles are expected to have numerous applications, such as probes for surface enhance Raman spectroscopy.

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“…Two broad D (1350 cm À1 ) and G (1580 cm À1 ) bands were observed in graphs for patterns Z3, Z4 and R1. These broad bands are derived from the typical sp 2 graphitic carbon E 2g stretching vibration mode [24][25][26]. The patterns with fully covered graphitised materials only exhibited the characteristic D and G peaks.…”

Section: Raman Spectroscopy Quality Analysismentioning

confidence: 99%

Analysis of femtosecond laser surface patterning on bulk single-crystalline diamond

Lee

Shi

et al. 2012

Journal of Experimental Nanoscience

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Preliminary work is reported on 2-D and 3-D microstructures written directly with a Yb:YAG 1026 nm femtosecond (fs) laser on bulk chemical vapour deposition (CVD) single-crystalline diamond. Smooth graphitic lines and other structures were written on the surface of a CVD diamond sample with a thickness of 0.7 mm under low laser fluences. This capability opens up the opportunity for making electronic devices and micro-electromechanical structures on diamond substrates. The fabrication process was optimised through testing a range of laser energies at a 100 kHz repetition rate with sub-500 fs pulses. These graphitic lines and structures have been characterised using optical microscopy, Raman spectroscopy, X-ray photoelectron spectroscopy and atomic force microscopy. Using these analysis techniques, the formation of sp 2 and sp 3 bonds is explored and the ratio between sp 2 and sp 3 bonds after fs laser patterning is quantified. We present the early findings from this study and characterise the relationship between the graphitic line formation and the different fs laser exposure conditions.

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Direct synthesis of sp-bonded carbon chains on graphite surface by femtosecond laser irradiation

Cited by 113 publications

References 23 publications

Carbon-atom wires: 1-D systems with tunable properties

Carbon-atom wires: 1-D systems with tunable properties

Femtosecond laser welded nanostructures and plasmonic devices

Analysis of femtosecond laser surface patterning on bulk single-crystalline diamond

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