Strong Purcell effect observed in single thick shell CdSe/CdS nanocrystals coupled to localized surface plasmons

High quality factor dielectric cavities designed to a nanoscale accuracy are mostly used to increase the spontaneous emission rate of a single emitter. Here we show that the coupling, at room temperature, between thick shell CdSe/CdS nanocrystals and random metallic films offers a very promising alternative approach. Optical modes confined at the nanoscale induce strong Purcell factors reaching values as high as 60. Moreover the quantum emission properties can be tailored: strong antibunching or radiative biexcitonic cascades can be obtained with high photon collection efficiency and extremely reduced blinking.Comment: 16 pages, 7 figure

Reassessment of pre-industrial fire emissions strongly affects anthropogenic aerosol forcing

Uncertainty in pre-industrial natural aerosol emissions is a major component of the overall uncertainty in the radiative forcing of climate. Improved characterisation of natural emissions and their radiative effects can therefore increase the accuracy of global climate model projections. Here we show that revised assumptions about pre-industrial fire activity result in significantly increased aerosol concentrations in the pre-industrial atmosphere. Revised global model simulations predict a 35% reduction in the calculated global mean cloud albedo forcing over the Industrial Era (1750–2000 CE) compared to estimates using emissions data from the Sixth Coupled Model Intercomparison Project. An estimated upper limit to pre-industrial fire emissions results in a much greater (91%) reduction in forcing. When compared to 26 other uncertain parameters or inputs in our model, pre-industrial fire emissions are by far the single largest source of uncertainty in pre-industrial aerosol concentrations, and hence in our understanding of the magnitude of the historical radiative forcing due to anthropogenic aerosol emissions

Medikationsfehler im Fokus der Forschung und Pharmakovigilanz

Unter „Medikationsfehler“ versteht man ein „Abweichen von dem für den Patienten optimalen Medikationsprozess, das zu einer grundsätzlich vermeidbaren Schädigung des Patienten führt oder führen könnte. Medikationsfehler können jeden Schritt des Medikationsprozesses betreffen und von jedem am Medikationsprozess Beteiligten … verursacht werden.“ Sie sind sowohl ein gesundheitsrelevantes als auch ein gesellschaftliches und letztlich auch ein ökonomisches Problem. Aufgrund der prinzipiellen Vermeidbarkeit von Schädigungen für Patienten sind Beachtung und Minimierung von Medikationsfehlern für das öffentliche Gesundheitswesen geboten und für die Forschung von zunehmender Bedeutung

Coronary Plaque Burden at Coronary CT Angiography in Asymptomatic Men and Women

full view, desk for the smoking room designed by Josef Hoffman