Gestão de conhecimento tácito na Embrapa: estratégias para estruturação e compartilhamento do capital intelectual na organização pública de pesquisa.

A abordagem deste Trabalho de Conclusão de Curso (TCC) buscará indicar meios, recursos e condições para o estabelecimento de espaços e formas de interação relacionados a processos de ensino e aprendizagem corporativa estabelecidos entre empregados da Embrapa. Tipicamente, a Embrapa segue um modelo tradicional centrado na parte técnica, onde o instrutor, enquanto especialista, transmite conhecimentos para os aprendizes. O TCC irá percorrer vias complementares e alternativas ao ensino tradicional, procurando explorar fundamentos para a gestão do valioso conhecimento organizacional que pertence à Embrapa, principalmente, o conhecimento tácito de seus empregados. Dentro da perspectiva inicial do TCC estava previsto um projeto-piloto para a criação de uma universidade corporativa, a “Universidade Embrapa”, que tornaria mais robustas as capacitações dentro da Empresa. A proposta, porém, revelou-se muito ambiciosa e complexa, dentro das possibilidades e oportunidades da Embrapa, considerando a pluralidade de temas e abordagens existentes nas 43 Unidades Descentralizadas (UDs) instaladas em todo o País, perpassando por 34 portfólios temáticos, onde estão distribuídos os projetos e as ações que estão conectadas com o direcionamento estratégico organizacional. Assim, inserida em um horizonte de tempo maior, a "Universidade Embrapa” servirá de inspiração para este trabalho, mas a ideia não será aprofundada neste momento. O escopo foi reduzido e o que este trabalho pretende apresentar, de forma exploratória e incremental, são passos iniciais que possam seguir na direção da criação de uma universidade corporativa para a Empresa. Desta forma, para ajustar-se às limitações dos recursos de tempo e equipe, e procurando alinhamento com a janela de oportunidades que a Embrapa oferece no momento, este TCC irá discorrer sobre a gestão do conhecimento corporativo no contexto da captura, retenção, estruturação e compartilhamento do conhecimento tácito dos empregados que estão em processos de pré-aposentadoria ou de empregados que estejam se desligando por outros motivos. Da mesma forma, irá abordar processos de capacitação para uma melhor integração à Empresa e para a aceleração do aprendizado de novos empregados, com previsão de ingresso a partir de concurso a ser realizado no primeiro semestre de 2024, após mais de 14 anos desde o último patrocinado pela Empresa.Monografia (Especialização) - Programa Corporativo de MBA em Gestão da Inovação e Capacidade Tecnológica, Fundação Getúlio Vargas, Brasília, DF. Orientador: André Saito

Efficient light-emitting diodes from mixed-dimensional perovskites on a fluoride interface

Light-emitting diodes based on halide perovskites have recently reached external quantum efficiencies of over 20%. However, the performance of visible perovskite light-emitting diodes has been hindered by non-radiative recombination losses and limited options for charge-transport materials that are compatible with perovskite deposition. Here, we report efficient, green electroluminescence from mixed-dimensional perovskites deposited on a thin (~1 nm) lithium fluoride layer on an organic semiconductor hole-transport layer. The highly polar dielectric interface acts as an effective template for forming high-quality bromide perovskites on otherwise incompatible hydrophobic charge-transport layers. The control of crystallinity and dimensionality of the perovskite layer is achieved by using tetraphenylphosphonium chloride as an additive, leading to external photoluminescence quantum efficiencies of around 65%. With this approach, we obtain light-emitting diodes with external quantum efficiencies of up to 19.1% at high brightness (>1,500 cd m−2)

Step-type and step-density influences on CO adsorption probed by reflection absorption infrared spectroscopy using a curved Pt(1 1 1) surface

In comparison to flat single crystals, the continuous variation of structure provided by curved crystals offers many benefits for the study of physical and chemical processes at surfaces. However, the curvature of the surface also creates experimental challenges. For infrared spectroscopy, in particular, adsorbates on metal samples are typically probed by grazing-incidence reflection-absorption infrared spectroscopy (RAIRS). In this geometry, a convex crystal acts as a strongly diverging mirror. The authors describe how the experimental difficulties introduced by a cylindrical surface can be resolved for RAIRS. A complementary mirror, placed directly downfield of the curved crystal within the vacuum chamber, minimizes the divergence created by the sample. By simply translating the infrared focus across the sample, the authors probe adsorbate vibrational spectra as a function of local step-type and step-density with high sensitivity and spatial resolution. Time-consuming sample exchange, and the concomitant sample-to-sample experimental errors, are eliminated. The authors apply this new technique to carbon monoxide adsorption on a curved Pt(1 1 1) crystal and use it to resolve the influence of step-type and step-density on the CO stretch vibration as a function of coverage.</p

Deoxyribonucleic Acid Encoded and Size-Defined π-Stacking of Perylene Diimides.

Funder: University of CambridgeNatural photosystems use protein scaffolds to control intermolecular interactions that enable exciton flow, charge generation, and long-range charge separation. In contrast, there is limited structural control in current organic electronic devices such as OLEDs and solar cells. We report here the DNA-encoded assembly of π-conjugated perylene diimides (PDIs) with deterministic control over the number of electronically coupled molecules. The PDIs are integrated within DNA chains using phosphoramidite coupling chemistry, allowing selection of the DNA sequence to either side, and specification of intermolecular DNA hybridization. In this way, we have developed a "toolbox" for construction of any stacking sequence of these semiconducting molecules. We have discovered that we need to use a full hierarchy of interactions: DNA guides the semiconductors into specified close proximity, hydrophobic-hydrophilic differentiation drives aggregation of the semiconductor moieties, and local geometry and electrostatic interactions define intermolecular positioning. As a result, the PDIs pack to give substantial intermolecular π wave function overlap, leading to an evolution of singlet excited states from localized excitons in the PDI monomer to excimers with wave functions delocalized over all five PDIs in the pentamer. This is accompanied by a change in the dominant triplet forming mechanism from localized spin-orbit charge transfer mediated intersystem crossing for the monomer toward a delocalized excimer process for the pentamer. Our modular DNA-based assembly reveals real opportunities for the rapid development of bespoke semiconductor architectures with molecule-by-molecule precision.ERC Horizon 2020 (grant agreement No 670405 and No 803326) EPSRC Tier-2 capital grant EP/P020259/1. Winton Advanced Research Programme for the Physics of Sustainability. Simons Foundation (Grant 601946). Swedish research council, Vetenskapsrådet 2018-0023

Advances in heterometallic ring-opening (co)polymerisation catalysis

Truly sustainable plastics require renewable feedstocks coupled with efficient production and end-of-life degradation/recycling processes. Some of the most useful degradable materials are aliphatic polyesters, polycarbonates and polyamides, which are often prepared via ring-opening (co)polymerisation (RO(CO)P) using an organometallic catalyst. While there has been extensive research into ligand development, heterometallic cooperativity offers an equally promising yet underexplored strategy to improve catalyst performance, as heterometallic catalysts often exhibit significant activity and selectivity enhancements compared to their homometallic counterparts. This review describes advances in heterometallic RO(CO)P catalyst design, highlighting the overarching structure-activity trends and reactivity patterns to inform future catalyst design

Development of microspheres for biomedical applications: a review

An overview of microspheres manufactured for use in biomedical applications based on recent literature is presented in this review. Different types of glasses (i.e. silicate, borate, and phosphates), ceramics and polymer-based microspheres (both natural and synthetic) in the form of porous , non-porous and hollow structures that are either already in use or are currently being investigated within the biomedical area are discussed. The advantages of using microspheres in applications such as drug delivery, bone tissue engineering and regeneration, absorption and desorption of substances, kinetic release of the loaded drug components are also presented. This review also reports on the preparation and characterisation methodologies used for the manufacture of these microspheres. Finally, a brief summary of the existing challenges associated with processing these microspheres which requires further research and development are presented