Search Results

You searched for all publications:

with publication states 'Published' 'Published (Approved)'
with Tags 'X-ray Microscopy'

Search Again...

These results include publications that have not yet been reviewed and processed by Diamond Light Source. To view only processed publications click here.

You can use the folder icon under Actions to collate papers as required. You can then click on View Folder in the left-hand navigation to review and/or download your folder.

Exact matches
Related results

43 items found (0 items not approved), displaying 41 to 43.[First/Prev] 1, 2, 3, 4, 5 [Next/Last]

Instruments / Technical Area	Publication Details	Published
I08-Scanning X-ray Microscopy beamline (SXM)	Investigation of the foil structure and corrosion mechanisms of modern Zwischgold using advanced analysis techniques Qing Wu , Karolina Soppa , Nadim Scherrer , Benjamin Watts , Tadahiro Yokosawa , Laetitia Bernard , Tohru Araki , Max Döbeli , Markus Meyer , Erdmann Spiecker , Rainer H. Fink Journal Of Cultural Heritage DOI: 10.1016/j.culher.2017.12.005 Diamond Proposal Number(s): [15595] Open Access Show Abstract ▼ Abstract: Zwischgold is a two-sided metal foil made by adhering a gold leaf over a silver leaf to present a gold surface while using less gold than gold foils. Corroded Zwischgold surfaces appear dark, accompanied by gloss loss and possible mechanical stability issues. Zwischgold applied artefacts are commonly found in museums and churches across Europe and they currently face an uncertain future as conservators have little knowledge to base conservation treatments on. We present a comprehensive material analysis of Zwischgold models through advanced characterization techniques including focused ion beam coupled with scanning electron microscopy (FIB-SEM), transmission electron microscopy (TEM), scanning transmission X-ray microscopy (STXM), time-of-flight secondary ion mass spectrometry (TOF-SIMS)and Rutherford backscattering spectrometry (RBS). Complementary information on the foil thickness,sharpness of the gold-silver interface, gold purity, and the formation as well as distribution of corrosion products on Zwischgold models have been obtained, representing a starting point for understanding themorphology and the long-term chemistry of Zwischgold artefacts.	Jan 2018
I08-Scanning X-ray Microscopy beamline (SXM)	Characterisation of Fe-bearing particles and colloids in the Lena River basin, NE Russia Catherine Hirst , Per S. Andersson , Samuel Shaw , Ian T. Burke , Liselott Kutscher , Melissa J. Murphy , Trofim Maximov , Oleg S. Pokrovsky , Carl-Magnus Mörth , Don Porcelli Geochimica Et Cosmochimica Acta DOI: 10.1016/j.gca.2017.07.012 Diamond Proposal Number(s): [11282] Show Abstract ▼ Abstract: Rivers are significant contributors of Fe to the ocean. However, the characteristics of chemically reactive Fe remain poorly constrained, especially in large Arctic rivers, which drain landscapes highly susceptible to climate change and carbon cycle alteration. The aim of this study was a detailed characterisation (size, mineralogy, and speciation) of riverine Fe-bearing particles (> 0.22 µm) and colloids (1 kDa – 0.22 µm) and their association with organic carbon (OC), in the Lena River and tributaries, which drain a catchment almost entirely underlain by permafrost. Samples from the main channel and tributaries representing watersheds that span a wide range in topography and lithology were taken after the spring flood in June 2013 and summer baseflow in July 2012. Fe-bearing particles were identified, using Transmission Electron Microscopy, as large (200 nm – 1 µm) aggregates of smaller (20 nm - 30 nm) spherical colloids of chemically-reactive ferrihydrite. In contrast, there were also large (500 nm – 1 µm) aggregates of clay (illite) particles and smaller (100 - 200 nm) iron oxide particles (dominantly hematite) that contain poorly reactive Fe. TEM imaging and Scanning Transmission X-ray microscopy (STXM) indicated that the ferrihydrite is present as discrete particles within networks of amorphous particulate organic carbon (POC) and attached to the surface of primary produced organic matter and clay particles. Together, these larger particles act as the main carriers of nanoscale ferrihydrite in the Lena River basin. The chemically reactive ferrihydrite accounts for on average 70 ± 15 % of the total suspended Fe in the Lena River and tributaries. These observations place important constraints on Fe and OC cycling in the Lena River catchment area and Fe-bearing particle transport to the Arctic Ocean.	Jul 2017
I12-JEEP: Joint Engineering, Environmental and Processing	Characterisation of vapour grown CdZnTe crystals using synchrotron X-ray topography Christopher K. Egan , Ashutosh Choubey , Moreton Moore , Robert J. Cernik Journal Of Crystal Growth 343 (1), 1-6 DOI: 10.1016/j.jcrysgro.2012.01.003 Diamond Proposal Number(s): [2933] Show Abstract ▼ Abstract: Synchrotron white beam X-ray topography has been used to characterise bulk crystal defects of thick vapour grown CdZnTe crystals. Whole 50 mm diameter wafers with thicknesses in the range of 2–3 mm were sliced from boules grown by the multi-tube physical vapour transport method and analysed by diffraction topography in a transmission geometry. A variety of defects were observed including cracks, voids and grain boundaries. The largest quantity of defects observed were sub-grains appearing as localised increased intensity in the topographs. The periphery of the wafers showed the highest number of defects, whereas central regions where largely defect-free. We failed to observe any inclusions or precipitates within these crystals. Surface damage from wire-saw cutting was also observed on poorly processed wafers; these defects were otherwise invisible to standard characterisation methods. X-ray topography has proven to be a useful tool for non-destructively investigating bulk extended defects in CdZnTe crystals for radiation detector applications.	Jan 2012

Publications Database

Search Results

You searched for all publications:

Search Again...

Subject Areas (check all that apply) select all

Instruments used to collect data (check all that apply) select all

Collaborations involved (check all that apply) select all

Diamond Offline Facilities used

Relevant Technical Areas (check all that apply) select all

Menu for Anonymous User