Coherent Bragg imaging of 60 nm Au nanoparticles under electrochemical control at the NanoMAX beamline
Nanoparticles are essential electrocatalysts in chemical production, water treatment and energy conversion, but engineering efficient and specific catalysts requires understanding complex structure – reactivity relations. Recent experiments have shown that Bragg coherent diffraction imaging might be a powerful tool in this regard. The technique provides three-dimensional lattice strain fields from which surface reactivity maps can be inferred. However, all experiments published so far have investigated particles an order of magnitude larger than those used in practical applications. Studying smaller particles quickly becomes demanding as the diffracted intensity falls. Here, in situ nanodiffraction data from 60 nm Au nanoparticles under electrochemical control collected at the hard X-ray nanoprobe beamline of MAX IV, NanoMAX, are presented. Two-dimensional image reconstructions of these particles are produced, and it is estimated that NanoMAX, which is now open for general users, has the requisites for three-dimensional imaging of particles of a size relevant for catalytic applications. This represents the first demonstration of coherent X-ray diffraction experiments performed at a diffraction-limited storage ring, and illustrates the importance of these new sources for experiments where coherence properties become crucial.
Authors: Hanewinkel R PMID: 31623003 [PubMed - in process]
Zum Kommentar von Prof. Reiner Hanewinkel zum Hot Topic-Thema „Raucherentwöhnung: E-Zigarette besser als klassische Nikotinersatzpräparate?“ Pneumologie 2019; 73: 336 – 337. Pneumologie. 2019 Oct;73(10):622 Authors: Pommer P PMID: 31623002 [PubMed - in process]
Authors: Schulz H, Karrasch S, Bölke G, Cyrys J, Hornberg C, Pickford R, Schneider A, Witt C, Hoffmann B PMID: 31623001 [PubMed - in process]
Leserbrief zu Schulz H, Karrasch S, Bölke G et al. Atmen: Luftschadstoffe und Gesundheit – Teil I. Pneumologie 2019; 73: 288 – 305. Pneumologie. 2019 Oct;73(10):617-619 Authors: Schnitzler A PMID: 31623000 [PubMed - in process]
Authors: Schöll N, Rohde GGU Abstract Pneumonia belongs to the most frequent and most deadly infectious diseases worldwide. It represents an increasing problem for the aging population. The incidence and mortality rises with every decade. The clinical presentation of pneumonia differs between elderly and younger patients. Multiple factors including functional status (self-dependency and immobilization), comorbidities, immunosenescence, nutritional status, swallowing disorders have to be accounted for. Pneumonia in the elderly has to be differentiated from nursing home acquired pneumonia. Diagnosis of pneumonia...
Perikardpunktion – Schritt für Schritt. Pneumologie. 2019 Oct;73(10):597-604 Authors: Ferrari MW PMID: 31622998 [PubMed - in process]
Authors: Raspe M, Rolling T, Leisse C, Fischer J, Lehmann C Abstract Infectious Diseases are a cross-sectional area connected to various medical disciplines and offer interested physicians multiple working opportunities. The spectrum of infectious diseases covers both out- and inpatient care as well as basic, clinical and epidemiological research. The need for infectious diseases specialists is increasing, thus career prospects are promising. Working conditions in infectious diseases are comparatively family-friendly. With this article we intend to arouse interest for working in the fascinating fields of infectious...
Authors: Bahmer T, Wälscher J, Fisser C, Kreuter M, Karg O, Böing S, Koczulla R, Raspe M PMID: 31622996 [PubMed - in process]
Lungengesundheit: Beruf als großer Risikofaktor? Pneumologie. 2019 Sep;73(9):e2 Authors: Simon A PMID: 31622984 [PubMed - in process]
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