Jason Keiper UNC at Chapel Hill CB# 3920, 211 Venable Hall Chapel Hill, NC 27599-3920 phone: (919) 962 3790 fax: (919) 962 2388 email: jkeiper@email.unc.edu

Projects    Publications & Presentations    Areas of interest    Directory of all NSF students

Projects:

Present: Development of small molecule surfactants for liquid and supercritical carbon dioxide.

	Lee, S. J.; Keiper, J. S. Giant vesicles as microchemical systems in Reactions and Synthesis in Surfactant Systems (ed., Texter, J.) Marcel Dekker,in press (invited book chapter).
	Keiper, J.; Romsted, L. S.; Yao, J.; Soldi, V. Interfacial compositions of cationic and mixed nonionic micelles by chemical trapping: A new method for characterizing the properties of amphiphilic aggregates. Colloids Surf. A, 2001, 176, 53.
	Menger, F. M.; Keiper, J. S.; Mbadugha, B. N. A.; Caran, K. L.; Romsted, L. S. Interfacial composition of gemini surfactants determined by chemical trapping. Langmuir ASAP, 2000.
	Keiper, J. S.; Menger, F. M. Giant vesicles. Angew. Chem. Int. Ed. 2000, 39, 2956 (invited book review).
	Menger, F. M.; Keiper, J. S. Gemini surfactants. Angew. Chem. Int. Ed. 2000,39, 1907.
	Menger, F. M.; Keiper, J. S.; Azov, V. Gemini surfactants with acetylenic spacers. Langmuir 2000, 16, 2062.
	Soldi, V.; Keiper, J.; Romsted, L. S.; Cuccovia, I. M.; Chaimovich, H. Arenediazonium salts: New probes for the interfacial compositions of association colloids. 6. Relationships between interfacial counterion and water concentrations and surfactant head group size, sphere-to-rod transitions, and chemical reactivity in cationic micelles. Langmuir, 2000, 16, 59.
	Menger, F. M.; Keiper, J. S. Digitonin as a chemical trigger for selectively transforming giant vesicles. Angew. Chem. Int. Ed. Engl. 1998, 37, 3433.
	Menger, F. M.; Keiper, J. S. Chemistry and physics of giant vesicles as biomembrane models. Curr. Opin. Chem. Biol. 1998, 2, 726.
	Menger, F. M.; Keiper, J. S. Giant vesicles: Micromanipulation of membrane bilayers. Adv. Mater. 1998, 10, 888.
	Apkarian, R. P.; Lee, S. Keiper, J. Refining equipment for high resolution in-lens cryo-SEM. Microsc. Microanal. 1998, 4, 258.
	Menger, F. M.; Lee, S. J.; Keiper, J. S. Induced separation of a binate vesicle into two independent entities. Chem. Commun. 1998, 957.
	Menger, F. M.; Keiper, J. S. Electrostatic layering of giant vesicles. Angew. Chem. Int. Ed. Engl. 1997, 36, 2489.
	Menger, F. M.; Keiper, J. S.; Lee, S. J. Adhesion of giant vesicles as observed by light microscopy. Langmuir 1997, 13, 4614.
	Menger, F. M.; Binder, W. H.; Keiper, J. S. Cationic surfactants with counterions of glucuronate glycosides. Langmuir 1997, 13, 4479.
	Menger, F. M.; Lee, S. J.; Keiper, J. S. Differentiating unilamellar, multilamellar, and oligovesicular vesicles using a fluorescent dye. Langmuir 1996, 12, 4479.

	Novel Surfactants
	Fluorosurfactants
	Self-assembly
	Micelles
	Microemulsions