Abstract
A thermodynamic theory of association to a molecule immobilized near a surface has been developed. Exact equations for the binding enthalpy, entropy and equilibrium reaction constant for an immobilized complex are derived. Using linear Poisson-Boltzmann theory of the electric double-layer interaction between an ion-penetrable sphere and a hard plate allows a closed form evaluation. We briefly discuss application of the theory to a DNA chip at high (1 M NaCl) and low (0.01 M NaCl) ionic strength for dielectric and metallic substrates. Predicted strong electrostatic effects suggest the feasibility of electronic control of DNA hybridization and design of chips avoiding the DNA folding problem.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 160-166 |
| Number of pages | 7 |
| Journal | Chemical Physics Letters |
| Volume | 323 |
| Issue number | 1-2 |
| DOIs | |
| State | Published - Jun 9 2000 |
| Externally published | Yes |
ASJC Scopus subject areas
- General Physics and Astronomy
- Physical and Theoretical Chemistry