Browsing ELibrary by Author "Fenter P."

Now showing items 1-9 of 9

ATOMIC-SCALE STRUCTURE OF THE ORTHOCLASE (001)-WATER INTERFACE MEASURED WITH HIGH-RESOLUTION X-RAY REFLECTIVITY

Fenter P.; Teng H.; Geissbuhler P.; Hanchar J.M.; Nagy K.L.; Sturchio N.C. (2000)

In situ X-ray specular reflectivity and atomic force microscopy were used to determine the structure of the orthoclase (001) cleavage surface in contact with deionized water at 25°C. These are the first in situ measurements ...
ORTHOCLASE DISSOLUTION KINETICS PROBED BY IN SITU X-RAY REFLECTIVITY: EFFECTS OF TEMPERATURE, PH, AND CRYSTAL ORIENTATION

Fenter P.; Park C.; Cheng L.; Zhang Z.; Krekeler M.P.S.; Sturchio N.C. (2003)

Initial dissolution kinetics at orthoclase (001) and (010) cleavage surfaces were measured for ~2 to 7 monolayers as a function of temperature using in situ X-ray reflectivity. The sensitivity of X-ray reflectivity to probe ...
RESOLVING ORTHOCLASE DISSOLUTION PROCESSES WITH ATOMIC FORCE MICROSCOPY AND X-RAY REFLECTIVITY

Teng H.H.; Fenter P.; Cheng L.; Sturchio N.C. (2001)

Direct measuremens of orthoclase (001) were performed using in situ atomic force microscopy (AFM) and synchrotron X-ray reflectivity to reveal the Α-scale dissolution process as a function of pH and temperature. Distinct ...
STRUCTURE AND GROWTH OF STEARATE MONOLAYERS ON CALCITE: FIRST RESULTS OF AN IN SITU X-RAY REFLECTIVITY STUDY1

Fenter P.; Sturchio N.C. (1999)

The adsorption of organic molecules at mineral-fluid interfaces has a profound influence upon geochemical reaction and transport processes, yet little is known about the in situ structures or properties of organic layers ...
STRUCTURE OF THE FLUORAPATITE (100)-WATER INTERFACE BY HIGH-RESOLUTION X-RAY REFLECTIVITY

Park C.; Fenter P.; Zhang Z.; Cheng L.; Sturchio N.C. (2004)

A complete understanding of the surface chemistry of the apatite-water system requires direct observation of the interfacial structure at the molecular scale. We report results for the structure of the apatite (100)-water ...
STRUCTURE OF THE ORTHOCLASE (001)- AND (010)-WATER INTERFACES BY HIGH-RESOLUTION X-RAY REFLECTIVITY

Fenter P.; Cheng L.; Park C.; Zhang Z.; Sturchio N.C. (2003)

High-resolution in situ X-ray specular reflectivity was used to measure the structures of orthoclase (001) and (010) cleavage surfaces in contact with deionized water at 25°C. X-ray reflectivity data demonstrate a high ...
STRUCTURES OF QUARTZ (100)- AND (101)-WATER INTERFACES DETERMINED BY X-RAY REFLECTIVITY AND ATOMIC FORCE MICROSCOPY OF NATURAL GROWTH SURFACES

Schlegel M.L.; Nagy K.L.; Fenter P.; Sturchio N.C. (2002)

The structures of prismatic (100) and pyramidal (101) growth faces of natural quartz crystals, and their modification upon annealing at T =< 400°C were investigated ex situ by atomic force microscopy (AFM) and in water by ...
SURFACE SPECIATION OF CALCITE OBSERVED IN SITU BY HIGH-RESOLUTION X-RAY REFLECTIVITY

Fenter P.; Geissbuhler P.; DiMasi E.; Srajer G.; Sorensen L.B.; Sturchio N.C. (2000)

High-resolution, in situ X-ray reflectivity measurements were made of the calcite (104)-water interface in calcite-saturated aqueous solutions at pH values ranging from 6.8 to 12.1 and low PCO2. The X-ray reflectivity data, ...
X-RAY STANDING WAVE STUDY OF ARSENITE INCORPORATION AT THE CALCITE SURFACE - PART 1. EXAFS STUDIES OF THE GEOMETRY OF COPRECIPITATED AND ADSORBED ARSENATE

Cheng L.; Fenter P.; Sturchio N.C.; Zhong Z.; Bedzyk M.J. (1999)

The location and orientation of arsenite incorporated at the CaCO3 (1014) cleavage surface from a dilute aqueous solution was examined with the X-ray standing wave (XSW) technique. The high coherent fractions measured for ...

Browsing ELibrary by Author "Fenter P."

Browsing ELibrary by Author "Fenter P."

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