In the last years have grown the interest to use nucleic acids and proteins in nanodevices. However, some their electronic properties remain unclear and there is still much more to be done. We address the problem of charge transport across a finite segment of DNA, using a linear chain model into tight binding framework with nearest neighbors interaction and one orbital per site to represent the DNA. Hydrations effects are taken into account as random variations of the self-energy. Transmission probability is calculated from transfer matrix concept.

En los últimos años ha crecido el interés de utilizar los ácidos nucleídos y proteínas en nanodispositivos. Sin embargo, algunas de sus propiedades electrónicas aún no se entienden claramente. Abordamos el problema de la transmisión electrónica a través de un segmento finito de ADN, usando un modelo de cadena lineal dentro del formalismo de enlace fuerte con interacción a primeros vecinos y un orbital por sitio para representar el ADN. Los efectos de hidratación se incluyen como variaciones aleatorias de las autoenergías. La probabilidad de transmisión se calcula a partir del concepto de matriz de transferencia.

Recent developments in the field of nano-electronics have encouraged the study of quasi one dimensional systems such as DNA and its applications to new devices. In this work we use two models to explore the vibrational properties of DNA-like chains: a linear chain and two laterally coupled linear chains. In the former case, the disorder induces a diatomic behavior, while monoatomic characteristics are displayed in the last case.