Abstract
Surface segregation of NaBr in mixed NaBr/NaCl crystals precipitated from aqueous solutions containing Br is investigated. Crystals were grown from solutions of a wide range of Br:Cl values and studied using x-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), energy-dispersive x-ray flourescence (EDX), and atomic force microscopy (AFM). Results indicates that NaBr surface-segregates to cover 4-5% of the surface at the Br:Cl value found in Sea water (1:660). The surface NaBr:NaCl values are ~ 35 times higher those of the bulk crystals. The surface NaBr forms domains of average size 635 nm x 635 nm x 53 nm. Large areas of the surface contain NaCl with no detectable NaBr. Complete surface segregation of all Br found in sea salt particles is likely to occur, thereby making a greater amount of Br available for surface reactions with gas-phase constituents than would be predicted based on bulk composition.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 995-998 |
| Number of pages | 4 |
| Journal | Geophysical Research Letters |
| Volume | 28 |
| Issue number | 6 |
| DOIs | |
| State | Published - Mar 15 2001 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Earth and Planetary Sciences (miscellaneous)
Cite this
Segregation of NaBr in NaBr/NaCl crystals grown from aqueous solutions : Implications for sea salt surface chemistry. / Zangmeister, C. D.; Jessica, A. T.; Pemberton, Jeanne E.
In: Geophysical Research Letters, Vol. 28, No. 6, 15.03.2001, p. 995-998.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Segregation of NaBr in NaBr/NaCl crystals grown from aqueous solutions
T2 - Implications for sea salt surface chemistry
AU - Zangmeister, C. D.
AU - Jessica, A. T.
AU - Pemberton, Jeanne E
PY - 2001/3/15
Y1 - 2001/3/15
N2 - Surface segregation of NaBr in mixed NaBr/NaCl crystals precipitated from aqueous solutions containing Br is investigated. Crystals were grown from solutions of a wide range of Br:Cl values and studied using x-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), energy-dispersive x-ray flourescence (EDX), and atomic force microscopy (AFM). Results indicates that NaBr surface-segregates to cover 4-5% of the surface at the Br:Cl value found in Sea water (1:660). The surface NaBr:NaCl values are ~ 35 times higher those of the bulk crystals. The surface NaBr forms domains of average size 635 nm x 635 nm x 53 nm. Large areas of the surface contain NaCl with no detectable NaBr. Complete surface segregation of all Br found in sea salt particles is likely to occur, thereby making a greater amount of Br available for surface reactions with gas-phase constituents than would be predicted based on bulk composition.
AB - Surface segregation of NaBr in mixed NaBr/NaCl crystals precipitated from aqueous solutions containing Br is investigated. Crystals were grown from solutions of a wide range of Br:Cl values and studied using x-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), energy-dispersive x-ray flourescence (EDX), and atomic force microscopy (AFM). Results indicates that NaBr surface-segregates to cover 4-5% of the surface at the Br:Cl value found in Sea water (1:660). The surface NaBr:NaCl values are ~ 35 times higher those of the bulk crystals. The surface NaBr forms domains of average size 635 nm x 635 nm x 53 nm. Large areas of the surface contain NaCl with no detectable NaBr. Complete surface segregation of all Br found in sea salt particles is likely to occur, thereby making a greater amount of Br available for surface reactions with gas-phase constituents than would be predicted based on bulk composition.
UR - http://www.scopus.com/inward/record.url?scp=0035866858&partnerID=8YFLogxK
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U2 - 10.1029/2000GL012539
DO - 10.1029/2000GL012539
M3 - Article
AN - SCOPUS:0035866858
VL - 28
SP - 995
EP - 998
JO - Geophysical Research Letters
JF - Geophysical Research Letters
SN - 0094-8276
IS - 6
ER -