Melting processes of two dimensional confined colloids interacting via a quasi-square well potential

Detalhes bibliográficos
Ano de defesa: 2018
Autor(a) principal: Jungmann, Rafael Magalhães
Orientador(a): Apolinário, Sérgio Wlademir da Silva
Banca de defesa: Não Informado pela instituição
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
dARK ID: ark:/64986/001300000xfpt
Idioma: eng
Instituição de defesa: Universidade Federal de Pernambuco
Programa de Pós-Graduação: Programa de Pos Graduacao em Fisica
Departamento: Não Informado pela instituição
País: Brasil
Palavras-chave em Português:
Dinâmica Molecular
Interações Competitivas
Física Teórica
Link de acesso: https://repositorio.ufpe.br/handle/123456789/41103
Resumo: In this M.Sc. dissertation we implement Brownian dynamics to investigate the melting pro- cesses of colloidal particles confined isotropically with competing interactions represented by a potential tailored in a repulsive-attractive-repulsive fashion as the inter-particle distance in- creases. The stable configurations of such system is composed of a large diversity of structures, which includes quasi-crystalline, triangular, square, and mixed orderings, as well as, the pres- ence of ornamental patterns such as fringes and holes, which are located, respectively, at the border and interior of the clusters. Our molecular dynamics simulations demonstrate that dur- ing the melting process particles are able to swing between some different micro phases. We also tested the fringes stability which demonstrated to be higher than the one found in compact clusters. Finally, we show that, at the high temperature regime, the system loses its angular ordering while still preserves its radial inter-particle confinement, which, ultimately, causes the proliferation of small sub-clusters.
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spelling Jungmann, Rafael Magalhãeshttp://lattes.cnpq.br/3576318910439025http://lattes.cnpq.br/1975993976921900Apolinário, Sérgio Wlademir da Silva2021-09-08T14:00:21Z2021-09-08T14:00:21Z2018-07-09Jungmann, Rafael Magalhães.Melting processes of two dimensional confined colloids interacting via a quasi-square well potential. 2018. Dissertação (Mestrado em Física) - Universidade Federal de Pernambuco, 2018.https://repositorio.ufpe.br/handle/123456789/41103ark:/64986/001300000xfptIn this M.Sc. dissertation we implement Brownian dynamics to investigate the melting pro- cesses of colloidal particles confined isotropically with competing interactions represented by a potential tailored in a repulsive-attractive-repulsive fashion as the inter-particle distance in- creases. The stable configurations of such system is composed of a large diversity of structures, which includes quasi-crystalline, triangular, square, and mixed orderings, as well as, the pres- ence of ornamental patterns such as fringes and holes, which are located, respectively, at the border and interior of the clusters. Our molecular dynamics simulations demonstrate that dur- ing the melting process particles are able to swing between some different micro phases. We also tested the fringes stability which demonstrated to be higher than the one found in compact clusters. Finally, we show that, at the high temperature regime, the system loses its angular ordering while still preserves its radial inter-particle confinement, which, ultimately, causes the proliferation of small sub-clusters.CNPqNesta dissertação de mestrado nós implementamos dinâmica browniana para investigar os processos de derretimento de partículas coloidais confinadas isotropicamente com interações competitivas representada por um potencial ajustado em uma forma repulsiva-atrativa-repulsiva a medida que a distância entre as partículas aumenta. As configurações estáveis desse sistema são compostas de uma grande diversidade de estruturas, que incluem organizações quasicristali- nas, triangulares, quadradas, e mistas, além da presença de padrões ornamentais como franjas e buracos, os quais estão localizadas, respectivamente, na borda e no interior dos aglomerados. Nossas simulações de dinâmica molecular demonstram que, durante o processo de derretimento, as partículas conseguem balançar entre diferentes micro fases. Nós também testamos a estabili- dade das franjas a qual demonstrou ser maior do que a encontrada em aglomerados compactos. Finalmente, nós mostramos que, no regime de temperaturas altas, o sistema perde sua organi- zação angular enquanto preserva seu confinamento radial entre as partículas, que, ultimamente, causa a proliferação de pequenos sub-aglomerados.engUniversidade Federal de PernambucoPrograma de Pos Graduacao em FisicaUFPEBrasilDinâmica MolecularInterações CompetitivasFísica TeóricaMelting processes of two dimensional confined colloids interacting via a quasi-square well potentialinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesismestradoinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFPEinstname:Universidade Federal de Pernambuco (UFPE)instacron:UFPEORIGINALDISSERTAÇÃO Rafael Magalhães Jungmann.pdfDISSERTAÇÃO Rafael Magalhães Jungmann.pdfapplication/pdf3045764https://repositorio.ufpe.br/bitstream/123456789/41103/1/DISSERTA%c3%87%c3%83O%20Rafael%20Magalh%c3%a3es%20Jungmann.pdf33ef18a6727cc37608496ad94d02570cMD51LICENSElicense.txtlicense.txttext/plain; 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dc.title.pt_BR.fl_str_mv Melting processes of two dimensional confined colloids interacting via a quasi-square well potential
title Melting processes of two dimensional confined colloids interacting via a quasi-square well potential
spellingShingle Melting processes of two dimensional confined colloids interacting via a quasi-square well potential
Jungmann, Rafael Magalhães
Dinâmica Molecular
Interações Competitivas
Física Teórica
title_short Melting processes of two dimensional confined colloids interacting via a quasi-square well potential
title_full Melting processes of two dimensional confined colloids interacting via a quasi-square well potential
title_fullStr Melting processes of two dimensional confined colloids interacting via a quasi-square well potential
title_full_unstemmed Melting processes of two dimensional confined colloids interacting via a quasi-square well potential
title_sort Melting processes of two dimensional confined colloids interacting via a quasi-square well potential
author Jungmann, Rafael Magalhães
author_facet Jungmann, Rafael Magalhães
author_role author
dc.contributor.authorLattes.pt_BR.fl_str_mv http://lattes.cnpq.br/3576318910439025
dc.contributor.advisorLattes.pt_BR.fl_str_mv http://lattes.cnpq.br/1975993976921900
dc.contributor.author.fl_str_mv Jungmann, Rafael Magalhães
dc.contributor.advisor1.fl_str_mv Apolinário, Sérgio Wlademir da Silva
contributor_str_mv Apolinário, Sérgio Wlademir da Silva
dc.subject.por.fl_str_mv Dinâmica Molecular
Interações Competitivas
Física Teórica
topic Dinâmica Molecular
Interações Competitivas
Física Teórica
description In this M.Sc. dissertation we implement Brownian dynamics to investigate the melting pro- cesses of colloidal particles confined isotropically with competing interactions represented by a potential tailored in a repulsive-attractive-repulsive fashion as the inter-particle distance in- creases. The stable configurations of such system is composed of a large diversity of structures, which includes quasi-crystalline, triangular, square, and mixed orderings, as well as, the pres- ence of ornamental patterns such as fringes and holes, which are located, respectively, at the border and interior of the clusters. Our molecular dynamics simulations demonstrate that dur- ing the melting process particles are able to swing between some different micro phases. We also tested the fringes stability which demonstrated to be higher than the one found in compact clusters. Finally, we show that, at the high temperature regime, the system loses its angular ordering while still preserves its radial inter-particle confinement, which, ultimately, causes the proliferation of small sub-clusters.
publishDate 2018
dc.date.issued.fl_str_mv 2018-07-09
dc.date.accessioned.fl_str_mv 2021-09-08T14:00:21Z
dc.date.available.fl_str_mv 2021-09-08T14:00:21Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.citation.fl_str_mv Jungmann, Rafael Magalhães.Melting processes of two dimensional confined colloids interacting via a quasi-square well potential. 2018. Dissertação (Mestrado em Física) - Universidade Federal de Pernambuco, 2018.
dc.identifier.uri.fl_str_mv https://repositorio.ufpe.br/handle/123456789/41103
dc.identifier.dark.fl_str_mv ark:/64986/001300000xfpt
identifier_str_mv Jungmann, Rafael Magalhães.Melting processes of two dimensional confined colloids interacting via a quasi-square well potential. 2018. Dissertação (Mestrado em Física) - Universidade Federal de Pernambuco, 2018.
ark:/64986/001300000xfpt
url https://repositorio.ufpe.br/handle/123456789/41103
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Universidade Federal de Pernambuco
dc.publisher.program.fl_str_mv Programa de Pos Graduacao em Fisica
dc.publisher.initials.fl_str_mv UFPE
dc.publisher.country.fl_str_mv Brasil
publisher.none.fl_str_mv Universidade Federal de Pernambuco
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFPE
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instname_str Universidade Federal de Pernambuco (UFPE)
instacron_str UFPE
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reponame_str Repositório Institucional da UFPE
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