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Sangeeta Talwar - One of the best experts on this subject based on the ideXlab platform.
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Structure of CdS-Cd-arachidate/arachidic acid composite Multilayers
Langmuir, 1998Co-Authors: Satish Vitta, S. Major, T. H. Metzger, Abirami Dhanabalan, Sangeeta TalwarAbstract:A composite Multilayer consisting of semiconducting CdS distributed in Cd-arachidate/arachidic acid layers was prepared by exposing the precursor Cd-arachidate Multilayers to H 2 S. The structures of the precursor Multilayers and the modified Multilayers were studied by grazing incidence reflection/diffraction using X-rays from a conventional generator and a synchrotron source. The formation of CdS in arachidic acid/Cd-arachidate composite Multilayers resulted in the introduction of a new layered structure with a period of 4.37 nm compared to the precursor Multilayer period of 5.55 nm. The reduction in the period of the Multilayers is consistent with the observation of a tilted structure found in alkanethiol and H 2 S exposed Cd-stearate Multilayers. The lateral morphology ofCdS which is replicated between the successive layers in the vertical direction is different when compared to the head group morphology in the precursor Multilayer. The molecular arrangement in the plane of the Cd-arachidate precursor Multilayer is found to be orthorhombic while the CdS molecules in the modified Multilayer are arranged in a hexagonal array. The lateral size of the CdS domains/particles is found to be 13 nm, at least an order of magnitude greater than the layer thickness. This clearly indicates that the CdS particles are quasi-2D in nature and are disk shaped.
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structure of cds cd arachidate arachidic acid composite Multilayers
Langmuir, 1998Co-Authors: Satish Vitta, S. Major, T. H. Metzger, Abirami Dhanabalan, Sangeeta TalwarAbstract:A composite Multilayer consisting of semiconducting CdS distributed in Cd-arachidate/arachidic acid layers was prepared by exposing the precursor Cd-arachidate Multilayers to H 2 S. The structures of the precursor Multilayers and the modified Multilayers were studied by grazing incidence reflection/diffraction using X-rays from a conventional generator and a synchrotron source. The formation of CdS in arachidic acid/Cd-arachidate composite Multilayers resulted in the introduction of a new layered structure with a period of 4.37 nm compared to the precursor Multilayer period of 5.55 nm. The reduction in the period of the Multilayers is consistent with the observation of a tilted structure found in alkanethiol and H 2 S exposed Cd-stearate Multilayers. The lateral morphology ofCdS which is replicated between the successive layers in the vertical direction is different when compared to the head group morphology in the precursor Multilayer. The molecular arrangement in the plane of the Cd-arachidate precursor Multilayer is found to be orthorhombic while the CdS molecules in the modified Multilayer are arranged in a hexagonal array. The lateral size of the CdS domains/particles is found to be 13 nm, at least an order of magnitude greater than the layer thickness. This clearly indicates that the CdS particles are quasi-2D in nature and are disk shaped.
Satish Vitta - One of the best experts on this subject based on the ideXlab platform.
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Structure of CdS-Cd-arachidate/arachidic acid composite Multilayers
Langmuir, 1998Co-Authors: Satish Vitta, S. Major, T. H. Metzger, Abirami Dhanabalan, Sangeeta TalwarAbstract:A composite Multilayer consisting of semiconducting CdS distributed in Cd-arachidate/arachidic acid layers was prepared by exposing the precursor Cd-arachidate Multilayers to H 2 S. The structures of the precursor Multilayers and the modified Multilayers were studied by grazing incidence reflection/diffraction using X-rays from a conventional generator and a synchrotron source. The formation of CdS in arachidic acid/Cd-arachidate composite Multilayers resulted in the introduction of a new layered structure with a period of 4.37 nm compared to the precursor Multilayer period of 5.55 nm. The reduction in the period of the Multilayers is consistent with the observation of a tilted structure found in alkanethiol and H 2 S exposed Cd-stearate Multilayers. The lateral morphology ofCdS which is replicated between the successive layers in the vertical direction is different when compared to the head group morphology in the precursor Multilayer. The molecular arrangement in the plane of the Cd-arachidate precursor Multilayer is found to be orthorhombic while the CdS molecules in the modified Multilayer are arranged in a hexagonal array. The lateral size of the CdS domains/particles is found to be 13 nm, at least an order of magnitude greater than the layer thickness. This clearly indicates that the CdS particles are quasi-2D in nature and are disk shaped.
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structure of cds cd arachidate arachidic acid composite Multilayers
Langmuir, 1998Co-Authors: Satish Vitta, S. Major, T. H. Metzger, Abirami Dhanabalan, Sangeeta TalwarAbstract:A composite Multilayer consisting of semiconducting CdS distributed in Cd-arachidate/arachidic acid layers was prepared by exposing the precursor Cd-arachidate Multilayers to H 2 S. The structures of the precursor Multilayers and the modified Multilayers were studied by grazing incidence reflection/diffraction using X-rays from a conventional generator and a synchrotron source. The formation of CdS in arachidic acid/Cd-arachidate composite Multilayers resulted in the introduction of a new layered structure with a period of 4.37 nm compared to the precursor Multilayer period of 5.55 nm. The reduction in the period of the Multilayers is consistent with the observation of a tilted structure found in alkanethiol and H 2 S exposed Cd-stearate Multilayers. The lateral morphology ofCdS which is replicated between the successive layers in the vertical direction is different when compared to the head group morphology in the precursor Multilayer. The molecular arrangement in the plane of the Cd-arachidate precursor Multilayer is found to be orthorhombic while the CdS molecules in the modified Multilayer are arranged in a hexagonal array. The lateral size of the CdS domains/particles is found to be 13 nm, at least an order of magnitude greater than the layer thickness. This clearly indicates that the CdS particles are quasi-2D in nature and are disk shaped.
P Prieto - One of the best experts on this subject based on the ideXlab platform.
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Hard coating performance enhancement by using [Ti/TiN]n, [Zr/ZrN]n and [TiN/ZrN]n Multilayer system
Materials Science and Engineering B-advanced Functional Solid-state Materials, 2010Co-Authors: Juan Carlos Caicedo, C. Amaya, Luis Yate, O. Nos, María Elena Pardo Gómez, P PrietoAbstract:In order to increase the performance of hard coatings for industrial application, Ti/TiN, Zr/ZrN and TiN/ZrN Multilayers were deposited onto Si(1 0 0) and AISI 5160 steel substrates via r.f. (13.56 MHz) multi-target magnetron sputtering technique. The crystallography structures of Ti/TiN, Zr/ZrN and TiN/ZrN Multilayers were evaluated via X-ray diffraction analysis (XRD). The composition, chemical-depth distribution and cross-sectional morphology of the films were characterized by EDX, SIMS, and SEM. The enhancement of mechanical properties and adherence strength behavior were determined via nanoindentation and scratch test, respectively. From these results, it was found that hardness and critical load of all Multilayer films depends on the bilayer period (� ) and bilayer number (n). Moreover, the TiN/ZrN Multilayer films exhibit the highest hardness (30 ± 1 GPa) and critical load (60 ± 1 N) in relation to Ti/TiN and Zr/ZrN Multilayers. The different mechanical performances and mechanisms in the Multilayers group were observed and discussed in this paper, suggesting the possibility to use AISI 5160 steel coated with Multilayers as cutting tools. © 2010 Elsevier B.V. All rights reserved.
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hard coating performance enhancement by using ti tin n zr zrn n and tin zrn n Multilayer system
Materials Science and Engineering B-advanced Functional Solid-state Materials, 2010Co-Authors: Juan Carlos Caicedo, C. Amaya, Luis Yate, O. Nos, María Elena Pardo Gómez, P PrietoAbstract:In order to increase the performance of hard coatings for industrial application, Ti/TiN, Zr/ZrN and TiN/ZrN Multilayers were deposited onto Si(1 0 0) and AISI 5160 steel substrates via r.f. (13.56 MHz) multi-target magnetron sputtering technique. The crystallography structures of Ti/TiN, Zr/ZrN and TiN/ZrN Multilayers were evaluated via X-ray diffraction analysis (XRD). The composition, chemical-depth distribution and cross-sectional morphology of the films were characterized by EDX, SIMS, and SEM. The enhancement of mechanical properties and adherence strength behavior were determined via nanoindentation and scratch test, respectively. From these results, it was found that hardness and critical load of all Multilayer films depends on the bilayer period (� ) and bilayer number (n). Moreover, the TiN/ZrN Multilayer films exhibit the highest hardness (30 ± 1 GPa) and critical load (60 ± 1 N) in relation to Ti/TiN and Zr/ZrN Multilayers. The different mechanical performances and mechanisms in the Multilayers group were observed and discussed in this paper, suggesting the possibility to use AISI 5160 steel coated with Multilayers as cutting tools. © 2010 Elsevier B.V. All rights reserved.
S. Major - One of the best experts on this subject based on the ideXlab platform.
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Structure of CdS-Cd-arachidate/arachidic acid composite Multilayers
Langmuir, 1998Co-Authors: Satish Vitta, S. Major, T. H. Metzger, Abirami Dhanabalan, Sangeeta TalwarAbstract:A composite Multilayer consisting of semiconducting CdS distributed in Cd-arachidate/arachidic acid layers was prepared by exposing the precursor Cd-arachidate Multilayers to H 2 S. The structures of the precursor Multilayers and the modified Multilayers were studied by grazing incidence reflection/diffraction using X-rays from a conventional generator and a synchrotron source. The formation of CdS in arachidic acid/Cd-arachidate composite Multilayers resulted in the introduction of a new layered structure with a period of 4.37 nm compared to the precursor Multilayer period of 5.55 nm. The reduction in the period of the Multilayers is consistent with the observation of a tilted structure found in alkanethiol and H 2 S exposed Cd-stearate Multilayers. The lateral morphology ofCdS which is replicated between the successive layers in the vertical direction is different when compared to the head group morphology in the precursor Multilayer. The molecular arrangement in the plane of the Cd-arachidate precursor Multilayer is found to be orthorhombic while the CdS molecules in the modified Multilayer are arranged in a hexagonal array. The lateral size of the CdS domains/particles is found to be 13 nm, at least an order of magnitude greater than the layer thickness. This clearly indicates that the CdS particles are quasi-2D in nature and are disk shaped.
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structure of cds cd arachidate arachidic acid composite Multilayers
Langmuir, 1998Co-Authors: Satish Vitta, S. Major, T. H. Metzger, Abirami Dhanabalan, Sangeeta TalwarAbstract:A composite Multilayer consisting of semiconducting CdS distributed in Cd-arachidate/arachidic acid layers was prepared by exposing the precursor Cd-arachidate Multilayers to H 2 S. The structures of the precursor Multilayers and the modified Multilayers were studied by grazing incidence reflection/diffraction using X-rays from a conventional generator and a synchrotron source. The formation of CdS in arachidic acid/Cd-arachidate composite Multilayers resulted in the introduction of a new layered structure with a period of 4.37 nm compared to the precursor Multilayer period of 5.55 nm. The reduction in the period of the Multilayers is consistent with the observation of a tilted structure found in alkanethiol and H 2 S exposed Cd-stearate Multilayers. The lateral morphology ofCdS which is replicated between the successive layers in the vertical direction is different when compared to the head group morphology in the precursor Multilayer. The molecular arrangement in the plane of the Cd-arachidate precursor Multilayer is found to be orthorhombic while the CdS molecules in the modified Multilayer are arranged in a hexagonal array. The lateral size of the CdS domains/particles is found to be 13 nm, at least an order of magnitude greater than the layer thickness. This clearly indicates that the CdS particles are quasi-2D in nature and are disk shaped.
T. H. Metzger - One of the best experts on this subject based on the ideXlab platform.
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Structure of CdS-Cd-arachidate/arachidic acid composite Multilayers
Langmuir, 1998Co-Authors: Satish Vitta, S. Major, T. H. Metzger, Abirami Dhanabalan, Sangeeta TalwarAbstract:A composite Multilayer consisting of semiconducting CdS distributed in Cd-arachidate/arachidic acid layers was prepared by exposing the precursor Cd-arachidate Multilayers to H 2 S. The structures of the precursor Multilayers and the modified Multilayers were studied by grazing incidence reflection/diffraction using X-rays from a conventional generator and a synchrotron source. The formation of CdS in arachidic acid/Cd-arachidate composite Multilayers resulted in the introduction of a new layered structure with a period of 4.37 nm compared to the precursor Multilayer period of 5.55 nm. The reduction in the period of the Multilayers is consistent with the observation of a tilted structure found in alkanethiol and H 2 S exposed Cd-stearate Multilayers. The lateral morphology ofCdS which is replicated between the successive layers in the vertical direction is different when compared to the head group morphology in the precursor Multilayer. The molecular arrangement in the plane of the Cd-arachidate precursor Multilayer is found to be orthorhombic while the CdS molecules in the modified Multilayer are arranged in a hexagonal array. The lateral size of the CdS domains/particles is found to be 13 nm, at least an order of magnitude greater than the layer thickness. This clearly indicates that the CdS particles are quasi-2D in nature and are disk shaped.
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structure of cds cd arachidate arachidic acid composite Multilayers
Langmuir, 1998Co-Authors: Satish Vitta, S. Major, T. H. Metzger, Abirami Dhanabalan, Sangeeta TalwarAbstract:A composite Multilayer consisting of semiconducting CdS distributed in Cd-arachidate/arachidic acid layers was prepared by exposing the precursor Cd-arachidate Multilayers to H 2 S. The structures of the precursor Multilayers and the modified Multilayers were studied by grazing incidence reflection/diffraction using X-rays from a conventional generator and a synchrotron source. The formation of CdS in arachidic acid/Cd-arachidate composite Multilayers resulted in the introduction of a new layered structure with a period of 4.37 nm compared to the precursor Multilayer period of 5.55 nm. The reduction in the period of the Multilayers is consistent with the observation of a tilted structure found in alkanethiol and H 2 S exposed Cd-stearate Multilayers. The lateral morphology ofCdS which is replicated between the successive layers in the vertical direction is different when compared to the head group morphology in the precursor Multilayer. The molecular arrangement in the plane of the Cd-arachidate precursor Multilayer is found to be orthorhombic while the CdS molecules in the modified Multilayer are arranged in a hexagonal array. The lateral size of the CdS domains/particles is found to be 13 nm, at least an order of magnitude greater than the layer thickness. This clearly indicates that the CdS particles are quasi-2D in nature and are disk shaped.
