Influência dos estímulos sensoriais na experiência da marca

Mestrado em GestãoO marketing sensorial é uma das formas mais recentes de cativar os consumidores, através dos estímulos dos cinco sentidos em vários elementos da loja. Este estudo desenvolveu e testou de forma empírica o modelo estrutural que analisa de que forma esses estímulos sensoriais afetam a experiência da marca, tendo em consideração a famosa marca de café Nespresso. Posteriormente verificou-se se a experiência da marca tem efeito na satisfação dos consumidores, bem como na sua lealdade. E se a satisfação afeta a lealdade dos consumidores A análise de fiabilidade, análise fatorial exploratória e técnicas de regressões lineares foram utilizadas para avaliar o modelo. Baseado nas respostas do questionário, foi verificado que existem influências dos estímulos sensoriais na experiência da marca e que a satisfação tem efeito na lealdade. Contudo, apenas algumas das dimensões da experiência da marca afetam a satisfação e lealdade da marca.Sensory marketing is one of the most recent ways to captivate consumers, through the stimulus of five senses in many elements of the store. This study developed and tested empirically the structural model that analyzes the way these sensory stimuli affect brand experience, considering the famous brand of coffee Nespresso. Afterwards, it was assessed if the brand experience affects consumer’s satisfaction as well as consumer's loyalty. And if this satisfaction affects consumers loyalty. Reliability analysis, exploratory factor analysis and linear regressions techniques were used to evaluate the model. Based on the answers of the survey, it was concluded that there are influences of sensory stimulus on brand experience and that satisfaction affects consumer loyalty. However, only some of the dimensions of the brand experience affect consumer’s satisfaction and loyalty

Responsive Microgels at Surfaces and Interfaces

Stimuli responsive surface structures attract increasing attention dueto a large variety of envisioned applications. The controlled organization ofpoly(N-isopropyl acrylamid), PNIPAM microgel particles at solid surfaces in-spired numerous research activities. In this review article, we briefly discuss theswelling/deswelling properties of adsorbed microgel particles in comparison tothe behavior in the bulk phase. The presence of the solid interface highly influ-ences and changes their behavior with respect to the properties in solution. Fur-thermore, the confinement on a solid substrate allows the direct and in-situ in-vestigation of the mechanical properties of the microgel particles. Additionally,we briefly review the research on microgel particles at liquid interfaces. At theseinterfaces new interesting effects occur. Moreover, we discuss some interestingwork on potential applications. In this context, microgel particles are often usedas an active component for responsive coatings of various functionality envision-ing applications, e.g. in medicine, biotechnology, and nanooptics

Inner structure and dynamics of microgels with low and medium crosslinker content prepared via surfactant-free precipitation polymerization and continuous monomer feeding approach

The preparation of poly(N-isopropylacrylamide) microgels via classical precipitation polymerization (batch method) and a continuous monomer feeding approach (feeding method) leads to different internal crosslinker distributions, i.e., from core–shell-like to a more homogeneous one. The internal structure and dynamics of these microgels with low and medium crosslinker concentrations are studied with dynamic light scattering and small-angle neutron scattering in a wide q-range below and above the volume phase transition temperature. The influence of the preparation method, and crosslinker and initiator concentration on the internal structure of the microgels is investigated. In contrast to the classical conception where polymer microgels possess a core–shell structure with the averaged internal polymer density distribution within the core part, a detailed view of the internal inhomogeneities of the PNIPAM microgels and the presence of internal domains even above the volume phase transition temperature, when polymer microgels are in the deswollen state, are presented. The correlation between initiator concentration and the size of internal domains that appear inside the microgel with temperature increase is demonstrated. Moreover, the influence of internal inhomogeneities on the dynamics of the batch- and feeding-microgels studied with neutron spin-echo spectroscopy is reported.TU Berlin, Open-Access-Mittel - 201

DLS setup for in-situ measurements of photo-induced size changes of microgel-based hybrid particles

Photoinduced size changes in microgel particles loaded with gold nanoparticles (AuNPs) were investigated with an extended multiangle dynamic light scattering (DLS) setup. The DLS setup was equipped with a conventional laser (λ = 633 nm) to determine the microgel particle size. Additionally, a laser (λ = 532 nm) is installed to study the photoresponsive behavior of the AuNP–microgel hybrids. The wavelength of 532 nm is close to the absorption maximum of the plasmon resonance of the AuNPs used in the present study (i.e. spherical AuNPs with a diameter of 14 nm). The extended DLS setup enables us to follow in situ the change in microgel size during irradiation. The light stimulus is directly correlated with the size changes of the hybrid particles and the photothermal effect depends on the intensity of the excitation laser. The increase in excitation laser intensity results in a size reduction of hybrid particles because of the ability of AuNPs to partially transform the absorbed photon energy into heat which is emitted into the surrounding microgel network

Surfactant monolayer bending elasticity in lipase containing bicontinuous microemulsions

Lipase-catalyzed reactions offer many advantages among which a high degree of selectivity combined with the possibility to convert even non-natural substrates are of particular interest. A major drawback in the applicability of lipases in the conversion of synthetically interesting, non-natural substrates is the substantial insolubility of such substrates in water. The conversion of substrates, natural or non-natural, by lipases generally involves the presence of a water-oil interface. In the present paper, we exploit the fact that the presence of lipases, in particular the lipase from Candida antarctica B (CalB), changes the bending elastic properties of a surfactant monolayer in a bicontinuous microemulsion consisting of D2O/NaCl -n-(d)-octane-pentaethylene glycol monodecyl ether (C10E5) in a similar manner as previously observed for amphiphilic block-copolymers. To determine the bending elastic constant, we have used two approaches, small angle neutron scattering (SANS) and neutron spin echo (NSE) spectroscopy. The time-averaged structure from SANS showed a slight decrease in bending elasticity, while on nanosecond time scales as probed with NSE, a stiffening has been observed, which was attributed to adsorption/desorption mechanisms of CalB at the surfactant monolayer. The results allow to derive further information on the influence of CalB on the composition and bending elasticity of the surfactant monolayer itself as well as the underlying adsorption/desorption mechanism

True Crime : an analysis of the True Crime genre based on the public broadcasting format "Der Fall"

Thema dieser wissenschaftlichen Arbeit ist die Analyse des True Crime Genre anhand des öffentlich-rechtlichen Formats „Der Fall" von Funk. Ziel der Arbeit ist es herauszufinden, anhand welcher Charakteristika journalistischer und audiovisueller True Crime Produktionen das Format „Der Fall" das Thema True Crime umsetzt. Es soll ersichtlich werden, welche Merkmale das Genre True Crime ausmachen und welche davon in „Der Fall" umgesetzt werden. Zur Untersuchung des Formats „Der Fall" wird die Methode der qualitativen Inhaltsanalyse in angepasster Form genutzt. Analysiert werden 30 Episoden, welche im Zeitraum vom 18.05.2021 bis 21.12.2021 auf dem YouTube-Kanal von „Der Fall" veröffentlicht worden. Dafür wird auf Basis der erarbeiteten True Crime Merkmale aus der Theorie ein Kategoriensystem erstellt. Das Ergebnis dieser Arbeit ist die Erkenntnis, dass „Der Fall" als typisches True Crime Format angesehen werden kann. Es bestehen vorwiegend Gemeinsamkeiten mit der Theorie und nur wenige Unterschiede. Alleinstellungsmerkmal ist der junge und moderne Aspekt des Formats, welcher sich durch Social Media Einblendungen bemerkbar macht. Außerdem setzt „Der Fall" einen großen Fokus auf den juristischen Kontext und die gesellschaftliche Einordnung

Wechselwirkung von Elektronen und Molekülen mit einzelnen SiO2-Nanopartikeln: Massenanalyse in einer Vierpolfalle

In dieser Dissertation wird eine neue Methode vorgestellt, welche die Untersuchung der Wechselwirkung von Atomen und Molekülen mit Oberflächen mit Ausdehnungen <10^-8 cm^2 gestattet. Die hochauflösende Massenspektrometrie an Nanopartikeln wird mit laserinduzierter thermischer Desorption kombiniert. Zur kontrollierten Variation der Temperatur der unter UHV-Bedingungen gespeicherten Siliziumdioxidpartikel wird ein IR-Laser verwendet. Die im Rahmen dieser Arbeit aufgebaute Apparatur beinhaltet die Kombination des IR-Lasers mit dem elektrodynamischen Partikelspeicher als auch den Aufbau eines externen optischen Streulichtnachweises mit einem Ar^+-Laser. Unter Berücksichtigung wirksamer Kühlmechanismen wird ein Zusammenhang zwischen Teilchentemperatur und erforderlicher IR-Bestrahlungsintensität hergestellt. Ein kinetisches Modell verknüpft die im Experiment als Funktion der Zeit gemessene Partikelmasse mit den grundlegenden physikalischen Größen zur Beschreibung von Adsorptions- und Desorptionsprozessen. Die vorgestellte neue experimentelle Methode wird exemplarisch anhand von Messungen wie zyklische Adsorptions- und Desorptionsmessungen bei Partialdrücken adsorbierender Moleküle von 10^-10-10^-11 mbar, Physisorption von Wasser und Charakterisierung der Oberfläche gespeicherter Partikel mittels thermischer Desorption bei Temperaturen bis 560 K demonstriert. Ein weiteres Beispiel beschreibt die Bestimmung der Aktivierungsenergie für die Desorption von Fullerenmolekülen, mit denen die Partikeloberfläche zuvor durch Bedampfung präpariert wurde. Die Bedampfung wird als zeitaufgelöster Adsorptionsvorgang gemessen. Abschließend wird die Entladung der Partikel beschrieben, die bei Temperaturen >550 K beobachtet wird. Die Entladung zeigt ein Schwellenverhalten und hängt offenbar von der Ladung der Partikel ab. Verschiedene Erklärungsmöglichkeiten werden diskutiert