Direct Measurement of Cw Laser-Induced Crystal Growth Dynamics by Time-Resolved Optical Reflectivity

1980 ◽  
Vol 1 ◽  
Author(s):  
G.L. Olson ◽  
S.A. Kokorowski ◽  
J.A. Roth ◽  
L.D. Hess
Keyword(s):  
Crystal Growth ◽  
Solid Phase ◽  
Growth Dynamics ◽  
Time Resolved ◽  
Laser Method ◽  
Optical Reflectivity ◽  
Spatially Resolved ◽  
Use Of Time ◽  
Cw Laser

ABSTRACTWe report the use of time-resolved optical reflectivity to directly monitor the dynamics of cw laser-induced solid phase epitaxy (SPE) of thin films. This in situ measurement technique utilizes optical interference effects between light reflected from the surface of a sample and from an advancing interface to provide continuous temporal and spatial resolution of crystal growth processes. SPE growth rates of ionimplanted films which are five orders of magnitude faster than previously observed can be induced and accurately measured with the laser method. Arsenic enhances the SPE rate, and spatially resolved measurements show that the growth rate for arsenic implanted films varies in accordance with the ionimplantation profile. Results are reported for silicon selfimplanted samples with and without subsequent arsenic ion implantation, and for silicon samples directly implanted with arsenic.

scholarly journals Spatiotemporal dynamics of nanowire growth in a microfluidic reactor

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Mazen Erfan ◽  
Martine Gnambodoe-Capochichi ◽  
Yasser M. Sabry ◽  
Diaa Khalil ◽  
Yamin Leprince-Wang ◽  
...  
Keyword(s):  
Synergetic Effect ◽  
Growth Dynamics ◽  
Time Resolved ◽  
Oxide Nanowires ◽  
Experimental Platform ◽  
Spatially Resolved ◽  
Microfluidic Reactor ◽  
Microfluidic Chamber ◽  
Confined Environment

AbstractCo-integration of nanomaterials into microdevices poses several technological challenges and presents numerous scientific opportunities that have been addressed in this paper by integrating zinc oxide nanowires (ZnO-NWs) into a microfluidic chamber. In addition to the applications of these combined materials, this work focuses on the study of the growth dynamics and uniformity of nanomaterials in a tiny microfluidic reactor environment. A unique experimental platform was built through the integration of a noninvasive optical characterization technique with the microfluidic reactor. This platform allowed the unprecedented demonstration of time-resolved and spatially resolved monitoring of the in situ growth of NWs, in which the chemicals were continuously fed into the microfluidic reactor. The platform was also used to assess the uniformity of NWs grown quickly in a 10-mm-wide microchamber, which was intentionally chosen to be 20 times wider than those used in previous attempts because it can accommodate applications requiring a large surface of interaction while still taking advantage of submillimeter height. Further observations included the effects of varying the flow rate on the NW diameter and length in addition to a synergetic effect of continuous renewal of the growth solution and the confined environment of the chemical reaction.

Direct observation of laser‐induced solid‐phase epitaxial crystallization by time‐resolved optical reflectivity

1980 ◽  
Vol 37 (11) ◽  
pp. 1019-1021 ◽  
Author(s):  
G. L. Olson ◽  
S. A. Kokorowski ◽  
R. A. McFarlane ◽  
L. D. Hess
Keyword(s):  
Direct Observation ◽  
Solid Phase ◽  
Time Resolved ◽  
Epitaxial Crystallization ◽  
Optical Reflectivity

Laser-Induced Crystal Growth Measurements By Time-Resolved Optical Reflectivity

1981 ◽  
Author(s):  
G. L. Olson ◽  
S. A. Kokorowski ◽  
J. A. Roth ◽  
R. S. Turley ◽  
L. D. Hess
Keyword(s):  
Crystal Growth ◽  
Time Resolved ◽  
Optical Reflectivity

Controlling Zeolitic Imidazolate Framework Nano- and Microcrystal Formation: Insight into Crystal Growth by Time-Resolved In Situ Static Light Scattering

2011 ◽  
Vol 23 (8) ◽  
pp. 2130-2141 ◽  
Author(s):  
Janosch Cravillon ◽  
Roman Nayuk ◽  
Sergej Springer ◽  
Armin Feldhoff ◽  
Klaus Huber ◽  
...  
Keyword(s):  
Crystal Growth ◽  
Light Scattering ◽  
Static Light Scattering ◽  
Zeolitic Imidazolate Framework ◽  
Time Resolved ◽  
Insight Into

scholarly journals Effect of Non-Hydrostatic Stress on Kinetics and Interfacial Roughness During Solid Phase Epitaxial Growth in Si

1996 ◽  
Vol 441 ◽  
Author(s):  
William Barvosa-Carter ◽  
Michael J. Aziz
Keyword(s):  
Growth Rate ◽  
Epitaxial Growth ◽  
Uniaxial Compression ◽  
Solid Phase ◽  
Hydrostatic Stress ◽  
Uniaxial Stress ◽  
Cross Sectional ◽  
Time Resolved ◽  
Crystal Interface

AbstractWe report preliminary in-situ time-resolved measurements of the effect of uniaxial stress on solid phase epitaxial growth in pure Si (001) for the case of stress applied parallel to the amorphous-crystal interface. The growth rate is reduced by the application of uniaxial compression, in agreement with previous results. Additionally, the velocity continues to decrease with time. This is consistent with interfacial roughening during growth under stress, and is supported by both reflectivity measurements and cross-sectional TEM observations. We present a new kinetically-driven interfacial roughening mechanism which is consistent with our observations.

scholarly journals `NMR Crystallization': in-situ NMR techniques for time-resolved monitoring of crystallization processes

2017 ◽  
Vol 73 (3) ◽  
pp. 137-148 ◽  
Author(s):  
Kenneth D. M. Harris ◽  
Colan E. Hughes ◽  
P. Andrew Williams ◽  
Gregory R. Edwards-Gau
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Solid Phase ◽  
Dynamic Properties ◽  
Time Resolved ◽  
Nmr Techniques ◽  
Versatile Technique ◽  
Crystallization From Solution ◽  
In Situ Nmr

Solid-state NMR spectroscopy is a well-established and versatile technique for studying the structural and dynamic properties of solids, and there is considerable potential to exploit the power and versatility of solid-state NMR for in-situ studies of chemical processes. However, a number of technical challenges are associated with adapting this technique for in-situ studies, depending on the process of interest. Recently, an in-situ solid-state NMR strategy for monitoring the evolution of crystallization processes has been developed and has proven to be a promising approach for identifying the sequence of distinct solid forms present as a function of time during crystallization from solution, and for the discovery of new polymorphs. The latest development of this technique, called `CLASSIC' NMR, allows the simultaneous measurement of both liquid-state and solid-state NMR spectra as a function of time, thus yielding complementary information on the evolution of both the liquid phase and the solid phase during crystallization from solution. This article gives an overview of the range of NMR strategies that are currently available for in-situ studies of crystallization processes, with examples of applications that highlight the potential of these strategies to deepen our understanding of crystallization phenomena.

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