Thu, 21 Aug 2008 11:08:05 BST CiteULike: rodneys Nelson http://www.citeulike.org/user/rodney/author/Nelson CiteULike.org en-gb Copyright © 2004-2008 citeulike.org http://www.citeulike.org/user/rodney/article/2360461 <i>Physics Today, Vol. 48, No. 12. (1995), pp. 25-30.</i><br /><br />Science in the United States is in a time of pain and uncertainty. The pain is felt most acutely by young scientists, who are having great difficulty establishing their careers. The uncertainty about the duration and outcome of the current situation stems from its roots in ponderous events of recent history—the end of the cold war, industrial downsizing, government deficits and demographic trends. Although budget difficulties and lack of jobs plague most of the sciences, the atmosphere of uncertainty about the future is palpably different from one profession to the next. Our concern here is with the profession of physics. What Future Will We Choose for Physics? Sol Gruner James Langer Phil Nelson Viola Vogel doi:10.1063/1.881477 Physics Today, Vol. 48, No. 12. (1995), pp. 25-30. 2008-02-10T22:44:41-00:00 1995 Physics Today 48 12 25 30 AIP community physics http://www.citeulike.org/user/rodney/article/1537239 <i>Science, Vol. 286, No. 5448. (17 December 1999), pp. 2325-2328.</i><br /><br />Colloidal particles can form unexpected two-dimensional ordered colloidal crystals when they interact with surfactants of the opposite charge. Coulomb interactions lead to self-limited adsorption of the particles on the surface of vesicles formed by the surfactants. The adsorbed particles form ordered but fluid rafts on the vesicle surfaces, and these ultimately form robust two-dimensional crystals. This use of attractive Coulomb interaction between colloidal particles and surfactant structures offers a potential new route to self-assembly of ordered colloidal structures. Surfactant-mediated two-dimensional crystallization of colloidal crystals L Ramos TC Lubensky N Dan P Nelson DA Weitz Science, Vol. 286, No. 5448. (17 December 1999), pp. 2325-2328. 2007-08-06T03:07:58-00:00 1999 Science 1095-9203 286 5448 2325 2328 2-d colloidal crystal monolayer surfactant http://www.citeulike.org/user/rodney/article/1531307 <i>Science, Vol. 285, No. 5426. (16 July 1999), pp. 394-397.</i><br /><br />A positively charged, mixed bilayer vesicle in the presence of negatively charged surfaces (for example, colloidal particles) can spontaneously partition into an adhesion zone of definite area and another zone that repels additional negative objects. Although the membrane itself has nonnegative charge in the repulsive zone, negative counterions on the interior of the vesicle spontaneously aggregate there and present a net negative charge to the exterior. Beyond the fundamental result that oppositely charged objects can repel, this mechanism helps to explain recent experiments on surfactant vesicles. Electrostatic repulsion of positively charged vesicles and negatively charged objects H Aranda-Espinoza Y Chen N Dan TC Lubensky P Nelson L Ramos DA Weitz Science, Vol. 285, No. 5426. (16 July 1999), pp. 394-397. 2007-08-02T21:20:54-00:00 1999 Science 1095-9203 285 5426 394 397 charge electrostatic monolayer negative positive repulsion vesicles