Drop shaped zinc oxide quantum dots and their self-assembly into dendritic nanostructures: Liquid assisted pulsed laser ablation and characterizations

2012 ◽  
Vol 258 (7) ◽  
pp. 2211-2218 ◽  
Author(s):  
Subhash C. Singh ◽  
Ram Gopal
Keyword(s):  
Quantum Dots ◽  
Zinc Oxide ◽  
Laser Ablation ◽  
Self Assembly ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Dendritic Nanostructures

Preparation of ZnO Nanoparticles by 1064/532nm Laser Ablation and Studying the Effect of the Ablation Wavelength

2021 ◽  
Vol 1021 ◽  
pp. 171-180
Author(s):  
Munaf S. Majeed ◽  
Rabea Q. Nafil ◽  
Marwa F. Abdul Jabbar ◽  
Kadhim H. Suffer
Keyword(s):  
Zinc Oxide ◽  
Laser Ablation ◽  
Pure Water ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Ultra Pure Water ◽  
Hexagonal Shape ◽  
532 Nm ◽  
Laser Ablation Technique

We prepared Zinc oxide nanomaterial employing PLA (pulsed laser ablation) technique. A pure Zn target was immersed in ultra-pure water (UPW) and it was subjected to several pulses (1st. and 2nd. harmonic) of the pumping Nd: YAG laser. The influence of changing laser’s wavelength (1064, 532) nm on the characterization of the produced nanoparticles was studied. The results obtained from studying the structure, topography, and morphology of the product showed that the particles have a hexagonal shape. Also, changing the wavelength of the laser from 532nm to 1064nm leads to size reduction and density increasing of the nanoparticles.

Synthesis of N-doped graphene quantum dots by pulsed laser ablation with diethylenetriamine (DETA) and their photoluminescence

2017 ◽  
Vol 19 (33) ◽  
pp. 22395-22400 ◽  
Author(s):  
S. R. M. Santiago ◽  
T. N. Lin ◽  
C. H. Chang ◽  
Y. A. Wong ◽  
C. A. J. Lin ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Laser Ablation ◽  
Graphene Quantum Dots ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Doped Graphene ◽  
One Step

We report a facile, fast, and one-step approach to prepare N-doped graphene quantum dots (GQDs) using pulsed laser ablation with diethylenetriamine (DETA).

Femtosecond pulsed laser ablation in microfluidics for synthesis of photoluminescent ZnSe quantum dots

2017 ◽  
Vol 414 ◽  
pp. 205-211 ◽  
Author(s):  
Chao Yang ◽  
Guoying Feng ◽  
Shenyu Dai ◽  
Shutong Wang ◽  
Guang Li ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Laser Ablation ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Femtosecond Pulsed Laser

scholarly journals Transforming Carbon Black into Graphene Oxide Quantum Dots by Pulsed Laser Ablation in Ethanol

2020 ◽  
Vol 58 (11) ◽  
pp. 808-814
Author(s):  
Jung-Il Lee ◽  
Jeong Ho Ryu
Keyword(s):  
Quantum Dots ◽  
Graphene Oxide ◽  
Laser Ablation ◽  
Carbon Black ◽  
Graphene Quantum Dots ◽  
Pulsed Laser ◽  
Blue Emission ◽  
Pulsed Laser Ablation ◽  
Absorption Bands ◽  
Graphene Oxide Quantum Dots

Graphene oxide quantum dots (GOQDs) are nanometer-sized graphene oxide fragments that exhibit unique properties, making them interesting candidates for a range of new applications. Carbon black, one of the commercially available carbon precursors, is produced by the thermal decomposition or incomplete combustion of organic compounds. It is commonly used as a supporting material for catalysts because of its excellent electrical conductivity, high surface area, and stability. In this paper, we report the transformation of carbon black into GOQDs in 10 min using a one-step facile approach. This transformation was achieved by pulsed laser ablation (PLA) in ethanol using the earth-abundant and low-cost carbon black as precursor. Only ethanol and carbon black were used for the transformation. The carbon clusters ablated from the carbon black were completely transformed into GOQDs with a homogeneous size distribution and heights in the range of 0.3-1.7 nm. This confirmed that the transformed GOQDs consisted of only single- or few-layered graphene quantum dots. The UV-vis spectra showed absorption bands at 215, 260, and 320 nm, which were attributed to the π→π* transition of the C=C of the sp<sup>2</sup> C bond in the sp<sup>3</sup> C matrix. A distinct blue emission peak at 450 nm was evident at an excitation wavelength of 360 nm. The broader PL emission spectra are due to the oxygen-related functional groups emitting PL between 300 and 440 nm.

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