Ultrafast structural evolution and formation of linear carbon chains in single-walled carbon nanotube networks by femtosecond laser irradiation

Ha, Jeonghong; Jung, Hyun Young; Hao, Ji; Li, Bo; Raeliarijaona, Aldo; Alarcon, Jorge A.; Terrones, Humberto; Ajayan, Pulickel M.; Jung, Yung Joon; Kim, Jaegu; Kim, Dongsik

doi:10.1039/c7nr05883g

Cited by 11 publications

(8 citation statements)

References 49 publications

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“…Femtosecond (fs) laser with ultrashort pulse durations and high peak power without causing thermal damage to the part is usually employed in nanostructures manufacture and nanomaterials modification [24,25,26,27]. It is an ideal tool for the excitation of surface plasmon resonances (SPRs), because the fs laser excitation can minimize thermal damage in the adjacent nanomaterials and substrate materials [28,29].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of the Conductivity and Uniformity of Silver Nanowire Flexible Transparent Conductive Films by Femtosecond Laser-Induced Nanowelding

Liang

Sun

et al. 2019

Nanomaterials

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In order to improve the performance of silver nanowire (AgNW) flexible transparent conductive films (FTCFs), including the conductivity, uniformity, and reliability, the welding of high repetition rate femtosecond (fs) laser is applied in this work. Fs laser irradiation can produce local enhancement of electric field, which induce melting at the gap of the AgNWs and enhance electrical conductivity of nanowire networks. The overall resistivity of the laser-welded AgNW FTCFs reduced significantly and the transparency changed slightly. Meanwhile, PET substrates were not damaged during the laser welding procedure in particular parameters. The AgNW FTCFs can achieve a nonuniformity factor of the sheet resistance as 4.6% at an average sheet resistance of 16.1 Ω/sq and transmittance of 91%. The laser-welded AgNW FTCFs also exhibited excellent reliability against mechanical bending over 10,000 cycles. The welding process may open up a new approach for improvement of FTCFs photoelectric property and can be applied in the fabrication of silver nanostructures for flexible optoelectronic and integration of functional devices.

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Section: Introductionmentioning

confidence: 99%

Enhancement of the Conductivity and Uniformity of Silver Nanowire Flexible Transparent Conductive Films by Femtosecond Laser-Induced Nanowelding

Liang

Sun

et al. 2019

Nanomaterials

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“…On the other hand, Arutyunyan et al [28] studied the selective removal of a specific category of SWCNT thin film by resonant ablation through femtosecond pulses. Most recently, the transformation of SWCNT structures into other allotropic carbon structures with effective coalescence through femtosecond laser irradiation was reported by Ha et al [2].…”

Section: Introductionmentioning

confidence: 98%

“…In recent years, the femtosecond laser appeared as a powerful technique to investigate laser matter interactions for micromachining, surface modification, laser surgery, nanostructure generation, structural evolutions, etc. [1,2]. Particularly, femtosecond laser assisted nano-joining has received great attention due to its critical role in the technological development of microelectronics, MEMS, and nano-devices among various applications [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…Particularly, femtosecond laser assisted nano-joining has received great attention due to its critical role in the technological development of microelectronics, MEMS, and nano-devices among various applications [3,4]. Several studies were performed on the joining of different materials with a laser beam in the form of bulk, as well as powder, at the nano and micron scales [2,[5][6][7][8][9][10][11][12][13][14]. For instance, Zhou et al joined Al and Fe nanoparticles by exposing them to multiple femtosecond laser pulses [15].…”

Section: Introductionmentioning

confidence: 99%

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Processing of Single-Walled Carbon Nanotubes with Femtosecond Laser Pulses

et al. 2019

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There are continued efforts to process and join single wall carbon nanotubes (SWCNTs) in order to exploit their exceptional functional properties for real-world applications. In this work, we report experimental observations of femtosecond laser irradiation on SWCNTs, in order to process and join them through an efficient and cost-effective technique. The nanotubes were deagglomerated in ethanol by an ultrasonicator and thin slurries of SWCNTs were spread evenly on glass substrates. A laser micromachining workstation for laboratory FemtoLAB (workshop of photonics) has been employed to irradiate the different SWCNTs film samples. The effect of laser parameters, such as pulse wavelength, laser power, etc., were systematically tuned to see the possibility of joining the SWCNTs ropes. Several experiments have been performed to optimize the parameters on different samples of SWCNTs. In general, the nanotubes were mostly damaged by the infrared (1st harmonics femtosecond laser) irradiation on the focal plane. However, the less damaging effect was observed for second harmonics (green wavelength) irradiation. The results suggest some joining of nanotubes along the sides of the focus plane, as well as on the center at the brink of nanotubes. The joining is considered to be established within the region of the high field intensity of the exposed femtosecond laser beam.

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“…It is reported that the isolated short linear carbon chains just reached a maximum length of 48 carbon atoms when they were end-capped by some huge functional groups . Therefore, the serendipitous discovery of carbon nanowires (CNWs, LLCCs@CNTs), made of LLCCs inserted inside carbon nanotubes (CNTs) by Zhao et al, paves the way for studying the structure and physical properties, as well as applications, of both LLCCs (carbyne) and CNWs (LLCCs@CNTs). − According to the type of CNTs outside LLCCs, CNWs (LLCCs@CNTs) can be categorized into single-walled CNWs (SWCNWs, LLCCs@SWCNTs), double-walled CNWs (DWCNWs, LLCCs@DWCNTs), and muti-walled CNWs (MWCNWs, LLCCs@MWCNTs) . MWCNWs (LLCCs@MWCNTs) and DWCNWs (LLCCs@DWCNTs) were obtained in 2003 and 2011, respectively. ,, Especially in 2016, Shi et al obtained the longest DWCNWs (LLCCs@DWCNTs) in which the LLCCs consisted of >6000 carbon atoms .…”

Section: Introductionmentioning

confidence: 99%

Anti-Stokes Raman Scattering of the Smallest Carbon Nanowires Made of Long Linear Carbon Chains Inserted inside Single-Walled Carbon Nanotubes

et al. 2023

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The smallest carbon nanowires, i.e., single-walled carbon nanowires (SWCNWs, LLCCs@SWCNTs) made of long linear carbon chains (LLCCs, sp) inserted inside single-walled carbon nanotubes (SWCNTs, sp 2 ), were successfully mass produced recently, making the refined strong Stokes Raman characterization of LLCCs@SWCNTs possible. This work reports the observation of anti-Stokes Raman scattering of LLCCs@SWCNTs with normal Raman spectroscopy, and their Stokes and anti-Stokes Raman scattering at a wide temperature range of 80−850 K has been systematically studied. It was found that the normalized intensity of Lband at 1835 cm −1 of LLCCs@SWCNTs decreased as the temperature increased, which obeys a quadratic polynomial fitting for Stokes and cubic fitting for anti-Stokes peaks. The absolute intensity of Stokes peaks decreased and that of anti-Stokes increased with the increasing temperature. Meanwhile, a softening of Stokes and anti-Stokes peaks was observed as the temperature increased. Furthermore, both the high-energy longitudinal phonon (G + ) of SWCNTs hosting LLCCs and the L-band originating from LLCCs inside SWCNTs exhibit a quasi-linear variation with temperature, having temperature coefficients of −0.0192 and −0.0296 cm −1 •K −1 for Stokes and 0.0200 and 0.0334 cm −1 •K −1 for anti-Stokes, respectively. The linear temperature dependence of peak positions of Lband implies that the crystal, vibrational, and electronic structures of LLCCs inside SWCNTs can be easily tuned via the temperature. This work paves the way for studying the mechanism of Raman process and fundamental properties of both LLCCs/ carbyne and SWCNWs (LLCCs@SWCNTs), as well as their potential applications in nanoscale temperature monitoring.

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Ultrafast structural evolution and formation of linear carbon chains in single-walled carbon nanotube networks by femtosecond laser irradiation

Cited by 11 publications

References 49 publications

Enhancement of the Conductivity and Uniformity of Silver Nanowire Flexible Transparent Conductive Films by Femtosecond Laser-Induced Nanowelding

Enhancement of the Conductivity and Uniformity of Silver Nanowire Flexible Transparent Conductive Films by Femtosecond Laser-Induced Nanowelding

Processing of Single-Walled Carbon Nanotubes with Femtosecond Laser Pulses

Anti-Stokes Raman Scattering of the Smallest Carbon Nanowires Made of Long Linear Carbon Chains Inserted inside Single-Walled Carbon Nanotubes

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