Quantum wires by direct laser fabrication

MRS Advances ◽  
2016 ◽  
Vol 1 (28) ◽  
pp. 2065-2069
Author(s):  
Anahita Haghizadeh ◽  
Haeyeon Yang
Keyword(s):  
Self Assembly ◽  
Quantum Wires ◽  
Optoelectronic Devices ◽  
Optoelectronic Device ◽  
Laser Fabrication ◽  
Growth Technique ◽  
Limited Success ◽  
Direct Laser ◽  
Device Applications ◽  
Direct Laser Fabrication

ABSTRACTFor optoelectronic device applications, quantum wires can be used as active media due to their unique physical properties. However, conventional approaches such as the self-assembly via the Stranski-Krastanov (S-K) growth technique have a limited success in their applications toward optoelectronic devices including photovoltaics and solar cells. A novel fabrication mechanism for quality quantum wires has been discovered. The laser fabricated nanowires semiconductor surfaces can have width and height as small as 30 and 5 nm, respectively while the density is one per 200 nm.

Direct Laser Fabrication of Compositionally Complex Materials

2020 ◽  
pp. 147-163
Author(s):  
Jithin Joseph
Keyword(s):  
Additive Manufacturing ◽  
Great Promise ◽  
Filler Materials ◽  
Chemical Homogeneity ◽  
Laser Fabrication ◽  
Direct Laser ◽  
Direct Laser Fabrication ◽  
Aerospace Medical ◽  
Complex Engineering ◽  
Cost Efficient

Additive manufacturing (AM) opens up the possibility of a direct build-up of components with sophisticated internal features or overhangs that are difficult to manufacture by a single conventional method. As a cost-efficient, tool-free, and digital approach to manufacturing components with complex geometries, AM of metals offers many critical benefits to various sectors such as aerospace, medical, automotive, and energy compared to conventional manufacturing processes. Direct laser fabrication (DLF) uses pre-alloyed powder mix or in-situ alloying of the elemental powders for metal additive manufacturing with excellent chemical homogeneity. It, therefore, shows great promise to enable the production of complex engineering components. This technique allows the highest build rates of the AM techniques with no restrictions on deposit size/shape and the fabrication of graded and hybrid materials by simultaneously feeding different filler materials. The advantages and disadvantages of DLF on the fabrication of compositionally complex metallic alloys are discussed in the chapter.

Direct Laser Fabrication of Defect Layers in Three-DimensionalChalcogenide Chiral Composites

2013 ◽  
Author(s):  
Benjamin P. Cumming ◽  
Mark. D. Turner ◽  
Sukanta Debbarma ◽  
Barry Luther-Davis ◽  
Gerd E. Schröder-Turk ◽  
...  
Keyword(s):  
Laser Fabrication ◽  
Direct Laser ◽  
Direct Laser Fabrication

Growth, physicochemical and quantum chemical investigations on 2-amino 5-chloropyridinium 4-carboxybutanoate – an organic crystal for biological and optoelectronic device applications

RSC Advances ◽  
2016 ◽  
Vol 6 (112) ◽  
pp. 110884-110897 ◽  
Author(s):  
B. Babu ◽  
J. Chandrasekaran ◽  
B. Mohanbabu ◽  
Yoshitaka Matsushita ◽  
M. Saravanakumar
Keyword(s):  
Single Crystals ◽  
Quantum Chemical ◽  
Room Temperature ◽  
Optoelectronic Device ◽  
Solution Growth ◽  
Slow Evaporation ◽  
Growth Technique ◽  
Optically Transparent ◽  
Device Applications ◽  
Solution Growth Technique

Optically transparent organic single crystals of 2-amino 5-chloropyridinium 4-carboxybutanoate (2A5C4C) with sizes of 7 × 4 × 2 mm3 were grown by a slow evaporation solution growth technique at room temperature using methanol solvent.

Direct laser fabrication and microstructure of a burn-resistant Ti alloy

2002 ◽  
Vol 23 (3) ◽  
pp. 239-247 ◽  
Author(s):  
X. Wu ◽  
R. Sharman ◽  
J. Mei ◽  
W. Voice
Keyword(s):  
Ti Alloy ◽  
Laser Fabrication ◽  
Direct Laser ◽  
Direct Laser Fabrication

Investigation on Inconel 625 Alloy Thin-Walled Parts by Direct Laser Fabrication

2011 ◽  
Vol 189-193 ◽  
pp. 3687-3691 ◽  
Author(s):  
Shi You Gao ◽  
Ye Fei Zhou ◽  
Ming Zhe Xi
Keyword(s):  
Process Parameters ◽  
Inconel 625 ◽  
Influence Of Process Parameters ◽  
Scanning Velocity ◽  
Laser Fabrication ◽  
Direct Laser ◽  
Inconel 625 Alloy ◽  
Direct Laser Fabrication ◽  
Thin Walled

In this paper, the process of direct laser fabricating (DLF) thin-walled parts with Inconel 625 alloy was studied. The interrelationship between deposition quality and process parameters has been analyzed in the aspects of laser power. Scanning velocity, powder feed velocity, z-increment. The further investigations of study lie on the influence of process parameters on geometrical characterization of single cladding layer, the Axis-Z increments on height of thin-walled part, as well as the microstructure of fabricated sample of Inconel 625. The results based on above experiments show that the Inconel 625 alloy parts can be fabricated by direct laser fabrication method and the samples were fully dense, homogenous and free of defects with the parameters under a certain range.

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