Time-resolved XAS (Bonn-SUT-SLRI) beamline at SLRI

Poo‐arporn, Yingyot; Chirawatkul, Prae; Saengsui, Worasarit; Chotiwan, Siwarak; Kityakarn, Sutasinee; Klinkhieo, Supat; Hormes, J.; Songsiriritthigul, Prayoon

doi:10.1107/s090904951204109x

Cited by 38 publications

(9 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Also, all functional EDXAS beamlines are adapted to use the horizontal dimension of the x-ray beam to provide wide energy range with horizontally diffracting bent crystal optics 10,11,39–42 . While this results in a small focused beam, it limits the ability to do full field imaging of larger specimens.…”

Section: Discussionmentioning

confidence: 99%

Wide field imaging energy dispersive X-ray absorption spectroscopy

Samadi

Martinson

et al. 2019

Sci Rep

View full text Add to dashboard Cite

A new energy dispersive X-ray absorption spectroscopy (EDXAS) method is presented for simultaneous wide-field imaging and transmission X-ray absorption spectroscopy (XAS) to enable rapid imaging and speciation of elements. Based on spectral K-Edge Subtraction imaging (sKES), a bent Laue imaging system diffracting in the vertical plane was developed on a bend magnet beamline for selenium speciation. The high flux and small vertical focus, forming a wide horizontal line beam for projection imaging and computed tomography applications, is achieved by precise matching of lattice plane orientation and crystal surface (asymmetry angle). The condition generating a small vertical focus for imaging also provides good energy dispersion. Details for achieving sufficient energy and spatial resolution are demonstrated for both full field imaging and computed tomography in quantifying selenium chemical species. While this system has lower sensitivity as it uses transmission and may lack the flux and spatial resolution of a dedicated focused beamline system, it has significant potential in rapid screening of heterogeneous biomedical or environmental systems to correlate metal speciation with function.

show abstract

Section: Discussionmentioning

confidence: 99%

Wide field imaging energy dispersive X-ray absorption spectroscopy

Samadi

Martinson

et al. 2019

Sci Rep

View full text Add to dashboard Cite

show abstract

“…XANES prepared samples were collected at Synchrotron Light Research Institute, Thailand. The Fe K-edge XANES were measured at BL2.2: TRXAS using Si (111) and NMOS detector [4].…”

Section: Methodsmentioning

confidence: 99%

P2EC.4 - Development of electrochemical sensor based on graphene nanocomposite for determination of β-agonists

Poo‐arporn¹,

Pakapongpan²,

Poo-arporn³

2018

Proceedings IMCS 2018

View full text Add to dashboard Cite

“…X-ray absorption near-edge structure (XANES) measurements were performed at the time-resolved XAS (Bonn-SUT-SLRI) beamline of the Synchrotron Light Research Institute, Thailand (Poo-arporn et al, 2012). The beamline employs an energy-dispersive monochromator equipped with a Si(111) single crystal and position-sensitive detector to obtain the XANES spectra.…”

Section: Methodsmentioning

confidence: 99%

Investigation of damaged interior walls using synchrotron-based XPS and XANES

Poo‐arporn

Thachepan

Palangsuntikul

2015

J Synchrotron Radiat

Self Cite

View full text Add to dashboard Cite

Evidence of internal sulfate attack in field exposure was demonstrated by the damaged interior wall of a three-year-old house situated in Nakhon Ratchasima Province, Thailand. Partial distension of the mortar was clearly observed together with an expansion of a black substance. Removal of the black substance revealed a dense black layer. This layer was only found in the vicinity of the damaged area, suggesting that this black material is possibly involved in the wall cracking. By employing synchrotron-based X-ray photoelectron spectroscopy (XPS) and X-ray absorption near-edge structure (XANES) techniques, the unknown sample was chemically identified. The S 2p and O 1s XPS results mutually indicated the existence of sulfate species in the materials collected from the damaged area. The XANES results indicated the presence of ferrous (II) sulfate, confirming sulfate-induced expansion and cracking. The sulfate attack in the present case appeared to physically affect the structure whereas the chemical integrity at the molecular level of the calcium silicate hydrate phase was retained since there was a lack of spectroscopic evidence for calcium sulfate. It was speculated that internal sulfate probably originated from the contaminated aggregates used during the construction. The current findings would be beneficial for understanding the sulfate-attack mechanism as well as for future prevention against sulfate attack during construction.

show abstract

Time-resolved XAS (Bonn-SUT-SLRI) beamline at SLRI

Cited by 38 publications

References 21 publications

Wide field imaging energy dispersive X-ray absorption spectroscopy

Wide field imaging energy dispersive X-ray absorption spectroscopy

P2EC.4 - Development of electrochemical sensor based on graphene nanocomposite for determination of β-agonists

Investigation of damaged interior walls using synchrotron-based XPS and XANES

Contact Info

Product

Resources

About