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Chapter II Solution Growth….<br />

and design, three dimensional and transient continuum transport, phase<br />

change phenomenon, and, ultimately, atomistic events. Altogether,<br />

Neugebauer [35] highlighted the challenges in the accurate simulations on<br />

crystal growth. According to his views, one naturally gets interested in a<br />

problem on a microscopic scale , where the size of typical surface features<br />

such as quantum dots, surface roughness, terrace length is in the order of 10<br />

to 1000 nm and the characteristic time-scale to form such features is in the<br />

order of seconds, the mechanisms leading to these structures, such as ad-<br />

atoms, adsorption, diffusion, de-sorption, island nucleation, require an atomic<br />

scale resolution , that is, a resolution in the length scale of 10 -1 nm and in the<br />

time scale of 10 -13 sec.<br />

2.3 Crystal Growth from Solution<br />

Crystal growth from solution is one of the most widely used<br />

techniques for the growth of crystals. This technique is practiced among the<br />

crystal growth community next to the melt growth technique. The main<br />

advantage of the solution growth is that the crystals are grown at<br />

temperatures well below their melting points. A detailed inherent knowledge is<br />

required for the melt growth techniques such as, melting point, melting<br />

behavior, stability in reduced pressure and atmosphere, however, which is not<br />

needed in the solution growth. Myriad technologically important crystals are<br />

grown by this technique. Solution growth techniques can broadly be<br />

subdivided as follows [11].<br />

67

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