Hilhorst, J; van Schooneveld, MM; Wang, J; de Smit, E; Tyliszczak, T; Raabe, J; Hitchcock, AP; Obst, M; de Groot, FMF; Pethukov, AV: Three-Dimensional Structure and Defects in Colloidal Photonic Crystals Revealed by Tomographic Scanning Transmission X-ray Microscopy, Langmuir, 28(7), 3614-3620 (2012), online: 2012-01-19, doi:10.1021/la204580y [Link]
Abstract:

Self-assembled colloidal crystals have attracted major attention because of their potential as low-cost three-dimensional (3D) photonic crystals. Although a high degree of perfection is crucial for the properties of these materials, little is known about their exact structure and internal defects. In this study, we use tomographic scanning transmission X-ray microscopy (STXM) to access the internal structure of self-assembled colloidal photonic crystals with high spatial resolution in three dimensions for the first time. The positions of individual particles of 236 nm in diameter are identified in three dimensions, and the local crystal structure is revealed. Through image analysis, structural defects, such as vacancies and stacking faults, are identified. Tomographic STXM is shown to be an attractive and complementary imaging tool for photonic materials and other strongly absorbing or scattering materials that cannot be characterized by either transmission or scanning electron microscopy or optical nanoscopy.

Upcoming ...

BayCEER Colloquium:
Th. 2020-04-23
Physical constraints and biological controls of plant-environment interactions
Ecological-Botanical Garden:
Su. 2020-04-05
Entfällt: 3x3=9: Wildkräuter für die Gründonnerstagssuppe
Fr. 2020-04-17
Entfällt: Mit tausend Schritten durch die Erdgeschichte: Gesteine im ÖBG
Su. 2020-04-19
Entfällt: Der ÖBG zum Kennenlernen: Allgemeine Gartenführung
Su. 2020-04-26
Von Sängern und Spöttern: Vogelstimmen im ÖBG (zusammen mit dem LBV)
BayCEER Blog
13.01.2020
Why Science Communication?
24.05.2019
Stoichiometric controls of C and N cycling
07.05.2019
Flying halfway across the globe to dig in the dirt – a research stay in Bloomington, USA
07.05.2019
EGU – interesting research and free coffee
RSS Blog as RSS Feed
Weather research site
Luftdruck (356m): 984.0 hPa
Lufttemperatur: -2.5 °C
Niederschlag: 0.0 mm/24h
Sonnenschein: <1 h/d
Wind (Höhe 17m): 3.2 km/h
Wind (Max.): 5.4 km/h
Windrichtung: SO

...more
Globalstrahlung: -6 W/m²
Lufttemperatur: -4.5 °C
Niederschlag: 0.2 mm/24h
Sonnenschein: 6 h/d
Wind (Höhe 32m): 6.6 km/h

...more
This site makes use of cookies More information