U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PubAg

Main content area

You searched for: Subject lasers Remove constraint Subject: lasers Subject term graphene Remove constraint Subject term: graphene Subject term irradiation Remove constraint Subject term: irradiation Text availability Citation in PubAg Remove constraint Text availability: Citation in PubAg
Start Over

Search

6  Search Results

1 - 6 of 6
Number of results to display per page

Search Results

1. Carbon Fibers with High Electrical Conductivity: Laser Irradiation of Mesophase Pitch Filaments Obtains High Graphitization Degree

Author:
Zhenghe Zhang; Weimin Yang; Lisheng Cheng; Weiyu Cao; Mohini Sain; Jing Tan; An Wang; Haibo Jia
Source:
ACS sustainable chemistry & engineering 2020 v.8 no.48 pp. 17629-17638
ISSN:
2168-0485
Subject:
carbon fibers; crystals; electrical conductivity; graphene; irradiation; lasers; temperature
Abstract:
... Carbon fibers have promising applications in the efficient transmission of electric power with less resource consumption. Laser graphitization of the mesophase pitch-based carbon fiber (MPCF) was proposed to improve the electrical conductivity of the carbon fiber. The obtained MPCF showed a high conductivity of 7.04 × 10⁵ S/m. The graphitization degree of carbon fiber increased and the interlayer ...
DOI:
10.1021/acssuschemeng.0c02454

2. Efficient defect healing and ultralow sheet resistance of laser-assisted reduced graphene oxide at ambient conditions

Author:
Aspasia Antonelou; Labrini Sygellou; Katerina Vrettos; Vasilios Georgakilas; Spyros N. Yannopoulos
Source:
Carbon 2018 v.139 pp. 492-499
ISSN:
0008-6223
Subject:
Raman spectroscopy; X-ray photoelectron spectroscopy; graphene; graphene oxide; industry; irradiation; lasers; welding
Abstract:
... Reduction of graphene oxide (GO) to a low-resistance product is one of the most versatile routes to obtain large volume graphene-based materials. A number of chemical and thermal methods are being applied to achieve this goal, albeit each one is bound to certain disadvantages and limitations. Laser-assisted reduction has emerged as a promising method apt to overcome issues related to chemical and ...
DOI:
10.1016/j.carbon.2018.07.012

3. Silk sericin induced fabrication of reduced graphene oxide and its in-vitro cytotoxicity, photothermal evaluation

Author:
Sireesh Babu Maddinedi; Jegatheeswaran Sonamuthu; Serap SuzuK Yildiz; Guobin Han; Yurong Cai; Junkuo Gao; Qingqing Ni; Juming Yao
Source:
Journal of photochemistry and photobiology 2018 v.186 pp. 189-196
ISSN:
1011-1344
Subject:
biocompatibility; cytotoxicity; drug therapy; graphene; graphene oxide; human cell lines; irradiation; lasers; nanomedicine; near infrared radiation; neoplasms; radiotherapy; sericin; silk; surgery
Abstract:
... Nowadays, photothermal agents have attained considerable attention in nanomedicine for the treatment of cancer after chemotherapy, surgery, biological therapy and radiotherapy. In this work, we showed a sericin-based, simple approach for synthesis of sericin functionalized reduced graphene oxide (SRGO) with low cytotoxicity and photo thermal efficiency. During the synthesis, the GO is deoxygenated ...
DOI:
10.1016/j.jphotobiol.2018.07.020

4. Reversible Photochemical Control of Doping Levels in Supported Graphene

Author:
Wang Hai I.; Braatz Marie-Luise; Richter Nils; Tielrooij Klaas-Jan; Mics Zoltan; Lu Hao; Weber Nils-Eike; Müllen Klaus; Turchinovich Dmitry; Kläui Mathias; Bonn Mischa
Source:
The Journal of Physical Chemistry C 2017 v.121 no.7 pp. 4083-4091
ISSN:
1932-7455
Subject:
electronics; energy; graphene; irradiation; lasers; optical properties; oxygen; photochemistry; physical chemistry; spectroscopy
Abstract:
... Controlling the type and density of charge carriers in graphene is vital for a wide range of applications of this material in electronics and optoelectronics. To date, chemical doping and electrostatic gating have served as the two most established means to manipulate the carrier density in graphene. Although highly effective, these two approaches require sophisticated graphene growth or complex d ...
DOI:
10.1021/acs.jpcc.7b00347

5. Laser processing of SiC: From graphene-coated SiC particles to 3D graphene froths

Author:
Aspasia Antonelou; Vassileios Dracopoulos; Spyros N. Yannopoulos
Source:
Carbon 2015 v.85 pp. 176-184
ISSN:
0008-6223
Subject:
Raman spectroscopy; cost effectiveness; electron microscopy; graphene; irradiation; lasers; silicon carbide
Abstract:
... Production of graphene-based structures and composites can be achieved in a number of ways using predominantly chemical-vapor-deposition-based approaches and solution chemistry methods. The present work investigates the feasibility of infrared lasers in the controlled graphitization of micron-sized SiC particles. It is demonstrated that laser-mediated SiC decomposition can result in a manifold of ...
DOI:
10.1016/j.carbon.2014.12.091

6. Preparation of polyynes by liquid-phase laser ablation using different irradiation target materials and solvents

Author:
Ryutaro Matsutani; Takuya Kakimoto; Hiromasa Tanaka; Kazuo Kojima
Source:
Carbon 2011 v.49 no.1 pp. 77-81
ISSN:
0008-6223
Subject:
1-propanol; anhydrides; butanol; carboxylic acids; ethanol; free radicals; graphene; hexane; irradiation; lasers; liquids; methanol; pellets; solvents
Abstract:
... Polyynes were prepared from pellets of a perylene derivative, 3,4,9,10-perylene tetracarboxylic dianhydride (PTCDA), and graphite by liquid-phase laser ablation, using solvents of methanol, ethanol, 1-propanol, 1-butanol, t-butyl alcohol, n-hexane, and decalin. The amounts of polyynes produced from PTCDA strongly depended on the polarity of the solvent, while those from graphite did not. Polar fun ...
DOI:
10.1016/j.carbon.2010.08.044