THE LATEST NEWS ABOUT US, GENERAL AND SPECIFIC OF EACH GROUP
- Nov 28, 2009 Oral on the Workshop on Nanomaterials for Energy and Biotechnology
- Nov 21, 2009 Instability of Cationic Gold Nanoparticle Bioconjugates: The Role of Citrate Ions
- Nov 21, 2009 Oral and Poster on the Workshop on Solid Oxide Fuel Cells: Materials and Technology
- Nov 17, 2009 Amphiphillic Organic Crystals
- Nov 17, 2009 Iodine/Iodide-Free Dye-Sensitized Solar Cells
- Nov 15, 2009 International Advisory Committee at Nanoagri 2010
- Nov 11, 2009 Plenary Speaker at Biosensors 2010
- Nov 10, 2009 Conference: 'La Ciencia inesperada. Historia de los descubrimientos que nadie buscó'
- Nov 07, 2009 Conference: 'Viaje a Nanolandia'
- Nov 04, 2009 Fabrication of large addition energy quantum dots in graphene
- Nov 02, 2009 Conference on NordsForsk spintronics workshop
- Nov 01, 2009 Invited Lecture at CNIC
Nov 17, 2009
Amphiphillic Organic Crystals
J. J. Segura, A. Verdaguer and J. Fraxedas, members and leader of the Small Molecules on surfaces in ambient and pristine conditions group at CIN2 (CSIC-ICN) published 'Amphiphillic Organic Crystals' on Journal of American Chemical Society, together with M. Cobián and E. R. Hernández, from the ICMAB.
The amphiphillic character, that is, the capacity to simultaneously attract and repel water, has been traditionally reserved to organic molecules such as phospholipids and surfactants, containing both hydrophilic and hydrophobic groups within the same molecule. However, this general concept can be extended to artificial structures such as micrometer-sized particles, the so-called Janus particles, and patterned surfaces. Here we provide an example of an amphiphillic crystalline solid, l-alanine, by combining atomic force microscopy measurements performed on two different cleavage surfaces showing contrasting behaviors when exposed to water vapor, with computer simulations that allow us to clarify the dipolar origin of this behavior. Although we take l-alanine as an example, our results should apply quite generally to dipolar molecular crystals.