Zobrazeno 1 - 10
of 146
pro vyhledávání: '"Pershan, P. S."'
Autor:
Shpyrko, Oleg G., Streitel, Reinhard, Balagurusamy, Venkatachalapathy S. K., Grigoriev, Alexei Yu., Deutsch, Moshe, Ocko, Benjamin M., Meron, Mati, Lin, Binhua, Pershan, Peter S.
A two dimensional crystalline layer is found at the surface of the liquid eutectic Au$_{82}$Si$_{18}$ alloy above its melting point $T_M=359 ^{\circ}$C. Underlying this crystalline layer we find a layered structure, 6-7 atomic layers thick. This surf
Externí odkaz:
http://arxiv.org/abs/cond-mat/0702413
Autor:
Balagurusamy, Venkatachalapathy S. K., Streitel, Reinhard, Shpyrko, Oleg G., Pershan, P. S., Meron, Mati, Lin, Binhua
X-ray reflectivity studies reveal atomic-level surface-segregation at the free surface of the eutectic Au71Sn29 liquid alloy. The surface-segregation extends up to three layers, in which the top layer is almost a pure monolayer of Sn, the second laye
Externí odkaz:
http://arxiv.org/abs/cond-mat/0702193
Publikováno v:
Phys. Rev. Lett. 97, 175503 (2006)
The filling behavior of a room temperature solvent, perfluoromethylcyclohexane, in approximately 20 nm nanoporous alumina membranes was investigated in situ with small angle x-ray scattering. Adsorption in the pores was controlled reversibly by varyi
Externí odkaz:
http://arxiv.org/abs/cond-mat/0612119
Autor:
Shpyrko, Oleg G., Streitel, Reinhard, Balagurusamy, V. S. K., Grigoriev, Alexei Y., Deutsch, Moshe, Ocko, Benjamin M., Meron, Mati, Lin, Binhua, Pershan, Peter S.
Publikováno v:
Science 313, 77 (2006)
X-ray measurements reveal a crystalline monolayer at the surface of the eutectic liquid Au_{82}Si_{18}, at temperatures above the alloy's melting point. Surface-induced atomic layering, the hallmark of liquid metals, is also found below the crystalli
Externí odkaz:
http://arxiv.org/abs/cond-mat/0607178
Autor:
Alvine, Kyle J., Pontoni, Diego, Shpyrko, Oleg G., Pershan, Peter S., Cookson, David J., Shin, Kyusoon, Russell, Thomas P., Brunnbauer, Markus, Stellacci, Francesco, Gang, Oleg
Publikováno v:
Phys. Rev. B 73, 125412 (2006)
The controlled self-assembly of thiol stabilized gold nanocrystals in a mediating solvent and confined within mesoporous alumina was probed in situ with small angle x-ray scattering. The evolution of the self-assembly process was controlled reversibl
Externí odkaz:
http://arxiv.org/abs/cond-mat/0603641
Autor:
Shpyrko, Oleg G., Grigoriev, Alexei Yu., Streitel, Reinhard, Pontoni, Diego, Pershan, Peter S., Ocko, Ben, Deutsch, Moshe, Meron, Mati, Lin, Binhua
Publikováno v:
Phys. Rev. Lett. 95, 106103 (2005)
Resonant x-ray reflectivity of the surface of the liquid phase of the Bi$_{43}$Sn$_{57}$ eutectic alloy reveals atomic-scale demixing extending over three near-surface atomic layers. Due to the absence of underlying atomic lattice which typically def
Externí odkaz:
http://arxiv.org/abs/cond-mat/0501173
Autor:
DiMasi, Elaine, Tostmann, Holger, Shpyrko, Oleg G., Huber, Patrick, Ocko, Benjamin M., Pershan, Peter S., Deutsch, Moshe, Berman, Lonny E.
We present the first resonant x-ray reflectivity measurements from a liquid surface. The surface structure of the liquid Hg-Au alloy system just beyond the solubility limit of 0.14at% Au in Hg had previously been shown to exhibit a unique surface pha
Externí odkaz:
http://arxiv.org/abs/cond-mat/0412113
Autor:
Tostmann, Holger, DiMasi, Elaine, Shpyrko, Oleg G., Ocko, Ben M., Pershan, Peter S., Deutsch, Moshe
Surface sensitive x-ray scattering techniques with atomic scale resolution are employed to investigate the microscopic structure of the surface of three classes of liquid binary alloys: (i) Surface segregation in partly miscible binary alloys as pred
Externí odkaz:
http://arxiv.org/abs/cond-mat/0412112
Autor:
DiMasi, Elaine, Tostmann, Holger, Shpyrko, Oleg G., Pershan, Peter S., Ocko, Benjamin M., Deutsch, Moshe
Measurements of the surface x-ray scattering from several pure liquid metals (Hg, Ga, and In) and from three alloys (Ga-Bi, Bi-In, and K-Na) with different heteroatomic chemical interactions in the bulk phase are reviewed. Surface-induced layering is
Externí odkaz:
http://arxiv.org/abs/cond-mat/0412110
Autor:
Tostmann, Holger, DiMasi, Elaine, Shpyrko, Oleg G., Pershan, Peter S., Ocko, Benjamin M., Deutsch, Moshe
We report an x-ray scattering study of the microscopic structure of the surface of a liquid alkali metal. The bulk liquid structure factor of the eutectic K67Na33 alloy is characteristic of an ideal mixture, and so shares the properties of an element
Externí odkaz:
http://arxiv.org/abs/cond-mat/0412109