Characterization of some tin-contained ancient glass beads found in China by means of SEM-EDS and raman spectroscopy

2012 ◽  
Vol 76 (2) ◽  
pp. 133-140 ◽  
Author(s):  
Qinghui Li ◽  
Song Liu ◽  
Bomin Su ◽  
Hongxia Zhao ◽  
Qiang Fu ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Glass Beads ◽  
Ancient Glass

scholarly journals Shedding New Light on Ancient Glass Beads by Synchrotron, SEM-EDS, and Raman Spectroscopy Techniques

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Seriwat Saminpanya ◽  
Chatree Saiyasombat ◽  
Nirawat Thammajak ◽  
Chanakarn Samrong ◽  
Sirilak Footrakul ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Southeast Asia ◽  
Glass Beads ◽  
Heavy Elements ◽  
Oxidation States ◽  
The West ◽  
Yellow Colour ◽  
X Ray ◽  
Ancient Glass ◽  
The Silk Road

Abstract The oxidation states of colouring elements and the pigments in ancient rare glasses have been investigated in this study. Synchrotron X-ray, SEM-EDS, and Raman techniques revealed that Cu2+plays a major role in blue and green glasses. The lead stannate pigment gives glasses a yellow colour. Copper and lead stannate can cause the green colour in glasses, and iron gives rise to the colour of black glasses. Microcomputed tomography reveals the distribution of the heavy elements, pigments, and inclusions in the glasses. The Dvaravati glasses in Southeast Asia may have been imported or technologically transferred to domestic manufacturers during trading on the Silk Road that connected the East and the West.

scholarly journals Compositional Variation and Color Diversity of Glass Beads from a 4th Century Tomb Complex in Korea

2021 ◽  
Vol 11 (11) ◽  
pp. 5233
Author(s):  
Jeongeun Yi ◽  
Hye-Ri Yang ◽  
Chan-Hee Lee
Keyword(s):  
Material Characterization ◽  
Glass Beads ◽  
Colored Glass ◽  
Compositional Variation ◽  
Chemical Compositions ◽  
Green Color ◽  
Ancient Glass ◽  
Glass Analysis ◽  
Alkali Elements

This study investigated the chemical compositions and color diversity of various colored glass beads excavated from the 4th century Suchonri site in Korea. The results reveal that the compositions of the coloring materials and stabilizers contain black or white impurities, and there are clear boundaries in the weathered surfaces within the glass beads. The weathered side turned brown, the amounts of Na and K are greater, and there is a decrease in alkali elements. The fragments in blue-green beads from tomb No. 11 were identified as potash glass, whereas the rest of the samples were soda glass. Analysis of the coloration elements identified Fe and Cu in all glass beads, and it was estimated that both elements resulted in a green color. Fe was predicted to cause a brown color. The results of the study may be used not only for scientific interpretation of the relics from the Suchonri tomb complex but also as archaeological evidence that may contribute to the material characterization of the ancient glass from the Korean peninsula.

Characterization of some ancient glass beads unearthed from the Kizil reservoir and Wanquan cemeteries in Xinjiang, China

Archaeometry ◽  
2013 ◽  
Vol 56 (4) ◽  
pp. 601-624 ◽  
Author(s):  
Q. H. Li ◽  
S. Liu ◽  
H. X. Zhao ◽  
F. X. Gan ◽  
P. Zhang
Keyword(s):  
Glass Beads ◽  
Ancient Glass

scholarly journals Morpho-molecular ex vivo detection and grading of non-muscle-invasive bladder cancer using forward imaging probe based multimodal optical coherence tomography and Raman spectroscopy

The Analyst ◽  
2020 ◽  
Vol 145 (4) ◽  
pp. 1445-1456 ◽  
Author(s):  
Fabian Placzek ◽  
Eliana Cordero Bautista ◽  
Simon Kretschmer ◽  
Lara M. Wurster ◽  
Florian Knorr ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Optical Coherence Tomography ◽  
Imaging System ◽  
Ex Vivo ◽  
Large Field ◽  
Optical Coherence ◽  
Fiber Optic Probe ◽  
Optic Probe ◽  
Muscle Invasive

Characterization of bladder biopsies, using a combined fiber optic probe-based optical coherence tomography and Raman spectroscopy imaging system that allows a large field-of-view imaging and detection and grading of cancerous bladder lesions.

scholarly journals Raman Spectroscopy Investigation of Graphene Oxide Reduction by Laser Scribing

2021 ◽  
Vol 7 (2) ◽  
pp. 48
Author(s):  
Vittorio Scardaci ◽  
Giuseppe Compagnini
Keyword(s):  
Raman Spectroscopy ◽  
Graphene Oxide ◽  
Reduce Graphene Oxide ◽  
Oxide Reduction ◽  
Material Parameters ◽  
Laser Scribing ◽  
Wide Range ◽  
Scan Speed ◽  
Laser Reduction

Laser scribing has been proposed as a fast and easy tool to reduce graphene oxide (GO) for a wide range of applications. Here, we investigate laser reduction of GO under a range of processing and material parameters, such as laser scan speed, number of laser passes, and material coverage. We use Raman spectroscopy for the characterization of the obtained materials. We demonstrate that laser scan speed is the most influential parameter, as a slower scan speed yields poor GO reduction. The number of laser passes is influential where the material coverage is higher, producing a significant improvement of GO reduction on a second pass. Material coverage is the least influential parameter, as it affects GO reduction only under restricted conditions.

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