Seminário

Optically heated Janus colloids in a binary liquid mixture

Motility and transient coarsening

Sala 1.4.14, Ciências ULisboa

Por Ania Maciolek (Max-Planck-Institut für Intelligente Systeme and IV. Institut für Theoretische Physik, Universität Stuttgart, Germany / Institute of Physical Chemistry, Polish Academy of Sciences, Warsaw, Poland).

Colloidal particles covered by materials that absorb light receive increasing attention in various fields of research and in many important applications, for example, bio-medical applications. Such particles become hot under illumination by laser. This gives rise to a variety of curious phenomena, which may be of practical use. For instance, an optically heated colloid suspended in a binary liquid mixture may self-propel or, if trapped by a laser beam, it becomes a microscopic engine.

Using a fluid particle dynamics approach we investigate a propulsion mechanism for a gold-capped Janus particle as a function of the wettability contrast between capped and uncapped sides of a Janus particle and of a heating power for symmetric and nonsymmetric binary solvent. We also have immobilized this particle in a narrow channel and studied nonequilibrium dynamics of a binary solvent around it using experiment and theory. Our results demonstrate that a remarkably complex time evolution of the concentration field around the colloid is governed by combined effects of temperature gradient and wettability, and crucially depends on whether the colloid is free to move or trapped. Moreover, we discover an important role of transient dynamics for self-propulsion.

16h00-17h00
CFTC - Centro de Física Teórica e Computacional

Solid Earth Seminar, por Catarina Guerreiro (Marine and Environmental Sciences Centre at Uni-Lisbon, Portugal).

Seminário do Laboratório de Instrumentação e Física Experimental de Partículas, por Philip Patrick Allport (University of Birmingham).

Seminário de Pós-graduação (Doutoramento em Biologia - Especialidade de Biologia Evolutiva), por Marta Maria Alves Antunes.

This talk will cover new methodologies of scientific visualization in high-performance computing systems specially designed for large scale scientific visualization that provide greater level of accuracy and detail.

This is the 11th edition of the Combinatorics Days, to be held online, Zoom platform, on the 21st and the 22nd of January.

Como é de conhecimento geral, assistimos atualmente a um rápido desenvolvimento nas formas de acesso à informação e publicação científica. O objetivo da jornada é fazer o ponto da situação na área da Matemática e discutir as perspetivas futuras.

The course SoilEco aims at introducing attendants to an updated state of the art of diversity of the soil biota and the functional roles played by soil organisms in key ecological processes.

Logótipo do evento, sobre um fundo branco

Understanding plant water relations at several scales under climate change is the theme of the XV Portuguese-Spanish Water relations Symposium: “Water relations under climate change: from genes to ecosystem”.

In this course, we promote a multidisciplinary approach presenting the most recent findings on the topic and challenging the traditional way of considering symbiotic associations as exceptions and not as the rule.

The goal of this course is to provide to the participants with current and practical knowledge on urban ecology, including ecological and social aspects.

Neste encontro, vamos descobrir as potencialidades da utilização do Jamboard - um quadro branco digital gratuito da Google - em trabalhos colaborativos.

Nesta formação, aprenderemos a criar apresentações dentro do Mentimeter, a criar diferentes tipos de slides e a selecionar as configurações mais adequadas aos objetivos pedagógicos.

Nesta formação, iremos abordar as diferentes etapas do processo de planificação de unidades curriculares e refletir conjuntamente em boas práticas sustentadas pela investigação.

Fotografia de placa de identificação de zona de plantação de vinha

Candidaturas até 28 de fevereiro de 2022.

This course aims to explore ways of communicating science to non-specialized audiences, such as policy makers, industry, general public (including students and teachers), through their engagement and participation in citizen science activities.

O evento pretende juntar técnicos, investigadores, estudantes, produtores, industriais e demais agentes da fileira, contribuindo para a atualização de dados sobre o setor e a partilha de conhecimentos sobre as potencialidades da flora portuguesa, para além, das condições edafoclimáticas nacionais que potenciam produtos de elevada qualidade.

This course introduces the field of island biogeography, a discipline that has long influenced other research areas such as macroecology, community ecology, evolution and conservation biology.

Scientists, as the main actors in the production of scientific knowledge, have the responsibility of having an active voice in communicating this knowledge – and that can be achieved for example by a conscious use of the communication tools at their disposal and a better articulation with journalists, among other means.

This course aims at providing students with basic knowledge of R programming, allowing them to manipulate and visualize data with R.

This course aims at providing students with statistical knowledge and tools to manipulate, analyze and visualize biological data with R. It also includes an introduction to modeling, simulations and Bayesian statistics.

Under the general framework of Global Change Ecology, the goal of this course is to provide the participants with the most recent and practical knowledge on the use of Functional Diversity.

The course provides essential skills and knowledge that enable the participants to develop climate change adaptation strategies.

The objective of this course is to provide participants with basic knowledge on a) the fundamental aspects of experimental design and b) workflows, platforms and tools to increase reproducibility at all scientific levels.

This is a mostly practical course offering an overview on different community ecology and macroecological methods and software. These will include all steps of a research project, from the optimal sampling of communities to process inference from large-scale patterns of taxon, phylogenetic and functional diversity.

This course aims to walk through the grounds of modern botany studies, covering subjects that have been excluded from most academic curricula.

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