Biomedical subjects

Lina R Saenz

Publications and source records attributed to Lina R Saenz.

2 recordsLinked to original sources

PubMed2006

Intensity enhancement of the vibrational spectrum of oxygen when attached to a platinum nanocluster.

Detecting single molecules is a technical and scientific challenge and requires to increase the number of molecules or their cross section to a radiation field in order to have a detectable signal. We demonstrate for a single molecule of oxygen that, by attaching the molecule to a nanocluster, the molecule signature spectrum is transferred to the larger complex (molecule cluster). Therefore, the detection can focus on the complex, which can have a much larger cross section, rather than on the small molecule. This is based on the concept of signature transfer, which can be used to detect in the cluster several other properties of the attached molecule.

Journal Article↗

PubMed2006

Platinum testbeds: interaction with oxygen.

We develop testbeds to study catalytic reactions modeled using the minimum number of platinum atoms needed to have an acceptable description of the chemistry on a realistic platinum surface that may include the contribution from a bulk continuum or may simply represent a local site on a nanocluster. In this particular case, the requirement is that a stable cluster may be connected to a stable bulk with equivalent highest occupied molecular orbital and Fermi level, respectively. We focus our work on the interaction of platinum clusters with molecular oxygen, which yields a complex cluster-molecule with fully delocalized molecular orbitals in the neighborhood of the Fermi energy of platinum, responsible for the interesting catalytic behavior of this material.

Journal Article↗