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Laser ablation or photoablation (also called laser blasting [1] [2] [3]) is the process of removing material from a solid (or occasionally liquid) surface by irradiating it with a laser beam. At low laser flux, the material is heated by the absorbed laser energy and evaporates or sublimates .
Laser ablation synthesis in solution (LASiS) is a commonly used method for obtaining colloidal solution of nanoparticles in a variety of solvents. [ 1 ] [ 2 ] Nanoparticles (NPs,), are useful in chemistry, engineering and biochemistry due to their large surface-to-volume ratio that causes them to have unique physical properties. [ 3 ]
The synthesis efficiency is about 100 times higher than for the laser ablation method. The time required to make SWNT forests of the height of 2.5 mm by this method was 10 minutes in 2004. Those SWNT forests can be easily separated from the catalyst, yielding clean SWNT material (purity >99.98%) without further purification.
CO 2 laser ablation technique is utilized to produce the first SWNHs at room temperature in absence of a metal catalyst. The CO 2 laser ablation generator is composed of a high-power CO 2 laser source (with a wavelength of 10.6 μm, 5 kW of power, 10 nm of beam diameter, and the pulse width varies from 10 ms to continuous illumination) and a plastic-resin reaction chamber attached with a ...
The catalyst particles obtained by laser ablation of a cobalt target sorted by size ultimately allow to grow a CNT density around 10 12 CNT cm −2 using a multistep process using plasma and catalyst particles around 4 nm. In spite of these efforts, the electrical resistance of such via is 34 Ω _for a 160 nm diameter.
Laser ablation electrospray ionization (LAESI) is an ambient ionization method for mass spectrometry that combines laser ablation from a mid-infrared (mid-IR) laser with a secondary electrospray ionization (ESI) process. The mid-IR laser is used to generate gas phase particles which are then ionized through interactions with charged droplets ...
Asteroid laser ablation is a proposed method for deflecting asteroids, involving the use of a laser array to alter the orbit of an asteroid. Laser ablation works by heating up a substance enough to allow gaseous material to eject, either through sublimation (solid to gas) or vaporization (liquid to gas). For most asteroids this process occurs ...
Top-down methods, such as laser ablation and ball-milling have also been reported. [25] Several solution-based methods have also been presented that often result in materials exhibiting F-band luminescence. [3] [4] Recently, it has been determined that some of these methods do not provide silicon quantum dots, but rather luminescent carbon ...