Parameters Influencing the Existence and the Observability of Etched Tracks: Application to Alpha Particle Detection in CR-39

Meyer, Pascal; Jouffroy, M.; Membrey, F.; Fromm, M.; Chambaudet, A.

doi:10.1093/oxfordjournals.rpd.a032184

Cited by 15 publications

(3 citation statements)

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“…1) and clamped using a microscopic slide as bottom cover. Before assembly, the cover glass was treated in 7 wt % NaOH solution at 60 °C for 20 min to increase negative charge and pit densities of the substrate surfaces in order to have the crystals stick better to the surface of the glass coverslip. − This treatment was necessary to prevent crystals from moving during atomic force microscopy scans. All components of the assembly were thoroughly rinsed in doubly distilled H 2 O with sonication for 5 min before use.…”

Section: Methodsmentioning

confidence: 99%

Label-Free Mapping of Osteopontin Adsorption to Calcium Oxalate Monohydrate Crystals by Tip-Enhanced Raman Spectroscopy

Kazemi-Zanjani

Chen²,

Goldberg³

et al. 2012

J. Am. Chem. Soc.

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In the ectopic biomineralization of calcium oxalate kidney stones, the competition between calcium oxalate monohydrate (COM) formation and its inhibition by the phosphoprotein osteopontin (OPN) plays a key role in COM stone-forming processes. To get more insights into these processes, tip-enhanced Raman spectroscopy (TERS) was used to provide surface-specific information about the adsorption of OPN to faces of COM crystals. In TERS, the surface plasmon resonance of a metallic AFM tip is locally excited when the tip is placed in the optical near-field of a laser focused on the crystal surface. Excitation of this localized surface plasmon resonance allows the enhancement of the Raman signal as well as the improvement of the spatial resolution beyond the diffraction limit of the light. As TERS works label free and noninvasively, it is an excellent technique to study the distribution of adsorbed proteins on crystal faces at the submicrometer scale. In the present work, we generated Raman intensity maps indicating high spatial resolution and a distinct variation in relative peak intensities. The collected TERS spectra show that the OPN preferentially adsorbs to edges and faces at the ends of COM crystals (order: {100}/{121} edge > {100} face > {100}/{010} edge ≈ {121}/{010} edge > {010} face) providing also relevant information on the inhibition of crystal growth. This study demonstrates that TERS is an excellent technique for detailed investigations of biomolecules adsorbed, layered, or assembled to a large variety of surfaces and interfaces.

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Section: Methodsmentioning

confidence: 99%

Label-Free Mapping of Osteopontin Adsorption to Calcium Oxalate Monohydrate Crystals by Tip-Enhanced Raman Spectroscopy

Kazemi-Zanjani

Chen²,

Goldberg³

et al. 2012

J. Am. Chem. Soc.

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“…The group from the Universite de Franche-Comte (UFC) has created a comprehensive computer code to simulate the track's evolution under chemical etching, using an adjusted function for the track etch rate (Fromm et al, 1991(Fromm et al, , 1993(Fromm et al, , 1996Membrey et al, 1993;Meyer et al, 1997Meyer et al, , 1998. Such functions have a number of adjustable free parameters.…”

Section: Introductionmentioning

confidence: 99%

Inter-comparison of geometrical track parameters and depth dependent track etch rates measured for Li-7 ions in two types of CR-39

Yamauchi

Ichijo

Oda

et al. 2001

Radiation Measurements

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The depth dependent track etch rates of two types of CR-39, TASTRAK and BARYOTRAK, for Li-7 ions with incident energies of 4.82, 6.75 and 10.77 MeV have been evaluated from track length measurements. The pit lengths versus the etching time obtained by three different laboratories have the same trend, but did not agree completely. These differences can be attributed to an error margin of less than one decimal point in the etching temperature. Significant deviations were also present for the assessed track etch rates. Most of the deviation was attributed to the derivation step of the growth curves. A sufficient amount of data and reasonably smooth growth curves were required near the Bragg peak in order to make a precise estimation.

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“…En effet, dans certains cas, lorsqu'une trace est inclinée, la gravure ne permet pas de la rendre observable en raison de l'attaque globale du matériau qui ronge la surface du détecteur plus rapidement que la trace elle-même en raison de son inclinaison. Cependant, comme la vitesse V T peut être croissante, la trace gravée peut apparaître après un certain temps : le temps différé (Meyer et al, 1997).…”

Section: Gravure Chimique Des Traces Nucléairesunclassified

Des détecteurs de traces à la radiobiologie : la contribution du LMN-AC

Fromm¹,

Groetz²

2006

Radioprotection

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RÉSUMÉNous présentons à travers l'historique du Laboratoire de Microanalyses Nucléaires Alain Chambaudet (LMN-AC) les différentes thématiques de recherche entrant dans le cadre de la dosimétrie des rayonnements ionisants et de la radiophysique.ABSTRACT From solid state nuclear track detectors to radiobiology: a contribution from LMN-AC.Through the story of the Alain Chambaudet Nuclear Microanalysis Laboratory, the research topics are outlined with relation to dosimetry and spectrometry of ionizing radiations and radiobiology. Article published by EDP Sciences and available at http://www.edpsciences.org/radiopro or http://dx

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Parameters Influencing the Existence and the Observability of Etched Tracks: Application to Alpha Particle Detection in CR-39

Cited by 15 publications

References 0 publications

Label-Free Mapping of Osteopontin Adsorption to Calcium Oxalate Monohydrate Crystals by Tip-Enhanced Raman Spectroscopy

Label-Free Mapping of Osteopontin Adsorption to Calcium Oxalate Monohydrate Crystals by Tip-Enhanced Raman Spectroscopy

Inter-comparison of geometrical track parameters and depth dependent track etch rates measured for Li-7 ions in two types of CR-39

Des détecteurs de traces à la radiobiologie : la contribution du LMN-AC

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