Liquid drop evaporation on surfaces is present in many industrial and medical applications, e.g., printed electronics, spraying of pesticides, DNA mapping, etc. Despite this strong interest, a theoretical description of the dynamic of the evaporation of complex liquid mixtures and nanosuspensions is still lacking. Indeed, one of the aspects that have not been included in the current theoretical descriptions is the competition between the kinetics of evaporation and the adsorption of surfactants and/or particles at the liquid/vapor and liquid/solid interfaces. Materials formed by an electrically isolating solid on which a patterned conducting layer was formed by the deposits left after drop evaporation have been considered as very promising for building electrical circuits on flexible plastic substrates. In this work, we have done an exhaustive study of the evaporation of nanosuspensions of latex and hydrophobized silver nanoparticles on four substrates of different hydrophobicity. The advancing and receding contact angles as well as the time dependence of the volume of the droplets have been measured over a broad range of particle concentrations. Also, mixtures of silver particles and a surfactant, commonly used in industrial printing, have been examined. Furthermore, the adsorption kinetics at both the air/liquid and solid/liquid interfaces have been measured. Whereas the latex particles do not adsorb at the solid/liquid and only slightly reduce the surface tension, the silver particles strongly adsorb at both interfaces. The experimental results of the evaporation process were compared with the predictions of the theory of Semenov et al. (Evaporation of Sessile Water Droplets: Universal Behavior in the Presence of Contact Angle Hysteresis. Colloids Surf. Physicochem. Eng. Asp. 2011, 391 (1-3), 135-144) and showed surprisingly good agreement despite that the theory was developed for pure liquids. The morphology of the deposits left by the droplets after total evaporation was studied by scanning electronic microscopy, and the effects of the substrate, the particle nature, and their concentrations on these patterns are discussed.
Vibronic coupling is key to efficient energy flow in molecular systems and a critical component of most mechanisms invoking quantum effects in biological processes. Despite increasing evidence for coherent coupling of electronic states being mediated by vibrational motion, it is not clear how and to what degree properties associated with vibrational coherence such as phase and coupling of atomic motion can impact the efficiency of light-induced processes under natural, incoherent illumination. Here, we show that deuteration of the H11–C11=C12–H12 double-bond of the 11-cis retinal chromophore in the visual pigment rhodopsin significantly and unexpectedly alters the photoisomerization yield while inducing smaller changes in the ultrafast isomerization dynamics assignable to known isotope effects. Combination of these results with non-adiabatic molecular dynamics simulations reveals a vibrational phase-dependent isotope effect that we suggest is an intrinsic attribute of vibronically coherent photochemical processes.
FG Bisesto, Anania, MP , Botton, M , Chiadroni, E , Cianchi, A , Curcio, A , Ferrario, M , Galletti, M , Henis, Z , Pompili, R , ו others, . 2018. “Evolution Of The Electric Fields Induced In High Intensity Laser–Matter Interactions”. Nuclear Instruments And Methods In Physics Research Section A: Accelerators, Spectrometers, Detectors And Associated Equipment, 909, Pp. 398–401.
It is well-established that in diverse societies, certain groups prefer to exclude other groups from power and often from society entirely. Yet as many societies are diversifying at an increasingly rapid pace,the need for cross-group cooperation to solve collective action problems has intensified. Do preferences for exclusion inhibit the ability of individuals to cooperate and, therefore, diminish the ability for societies to collectively provide public goods? Turning to Israel, a society with multiple overlapping and politically salient cleavages, we use a large-scale lab-in-the-field design to investigate how preferences for exclusion among the Jewish majority predict discriminatory behavior toward Palestinian Citizens of Israel. We establish that preferences for exclusion are likely symbolic attitudes, and therefore stable and dominating of other attitudes; are held especially strongly by low-status majority group members; and powerfully predict costly non-cooperation. This preferences/behavior relationship appears unaffected by mitigating factors proposed in the intergroup relations literature. The demonstrated influence of symbolic attitudes on behavior calls for further examination of the social roots of exclusionary preferences.
This paper teases out the intersections of list-making as an everyday experience and the incorporation of lists and enumerations in literary texts. Drawing on cognitive literary theory and the notion of experientiality, I argue that lists evoke our sensorimotor experience (the practice of writing lists) as well as our capacity to structure and organize the world (using and making sense of lists). When we as readers encounter lists in literary texts, such as the shopping lists in Helen Fielding’s novel Bridget Jones’s Diary, our experience of making lists ourselves is evoked and thus leads to an experiential response that cannot be explained by Monika Fludernik’s definition of experientiality as a “quasi-mimetic evocation of ‘real-life experience.’” This is due to the nature of lists and the practice of making lists, which combines physical with cognitive experience.
June 2018: Eva von Contzen is junior professor of English literature at the University of Freiburg and the principal investigator of the ERC-funded project “Lists in Literature and Culture.” She is the author of a monograph on medieval hagiography (The Scottish Legendary: Towards a Poetics of Hagiographic Narration; Manchester 2016) and pursues her interest in narrative theory and medieval literature in the interdisciplinary network “Medieval Narratology.” She is the co-editor of a handbook of historical narratology (with Stefan Tilg). Currently, her main project is devoted to lists and enumerations in literary texts from Antiquity to postmodernism.
We introduce and demonstrate double-bright electromagnetically-induced-transparency (D-EIT) cooling as an extension to EIT cooling. By involving an additional ground state, two bright states can be shifted individually into resonance for cooling of motional modes of frequencies that may be separated by more than the width of a single EIT cooling resonance. This allows three-dimensional ground-state cooling of a 40Ca+ ion trapped in a linear Paul trap with a single cooling pulse. Measured cooling rates and steady-state mean motional quantum numbers for this D-EIT cooling are compared with those of standard EIT cooling as well as concatenated standard EIT cooling pulses for multimode cooling. Experimental results are compared to full-density matrix calculations. We observe a failure of the theoretical description within the Lamb-Dicke regime that can be overcome by a time-dependent rate theory. Limitations of the different cooling techniques and possible extensions to multi-ion crystals are discussed.
Public choice theory (PCT) has had a powerful influence on political science and, to a lesser extent, public administration. Based on the premise that public officials are rational maximizers of their own utility, PCT has a quite successful record of correctly predicting governmental decisions and policies. This success is puzzling in light of behavioral findings showing that officials do not necessarily seek to maximize their own utility. Drawing on recent advances in behavioral ethics, this article offers a new behavioral foundation for PCT's predictions by delineating the psychological processes that lead well‐intentioned people to violate moral and social norms. It reviews the relevant findings of behavioral ethics, analyzes their theoretical and policy implications for officials' decision making, and sets an agenda for future research
