Materials & Nanoscience

Molecular Adsorption on Metallic Interfaces: Beyond the Cartoons (#102)

Electrode surfaces modified with molecular adsorbates forms the basis of a significant number of electrochemical approaches for biosensing and bioelectronics applications. The modified electrochemical interface can be a result of simple physisorption, electrostatic interaction or via a stronger chemisorption bond. The characteristics of the adsorbed molecular layer can be determined through a delicate balance between the molecule - electrode or intermolecular interactions. The initial assumption of a uniform molecular picture of adsorbates throughout the electrode surface, usually described as simple cartoon representations of the molecular layer, can misrepresent the regions which are not so simply organized. This becomes particularly important when chemical modification of the adsorbed layer is used to form multilayered, functional structures. This symposium will focus on the characterization and implications of the non-uniformity of these molecular layers through approaches that are able to 'see' these regions. We encourage contributions that present results on the methods for studying these surfaces, particularly in-situ methods, the unusual responses that can be observed correlated to unusual surface structures and methods that are used to overcome or take advantage of these unique structures. Topics to be covered include (i) measuring non-uniformity of modified metal surfaces using ex-situ and in-situ approaches with particular emphasis on electrochemical interfaces, (ii) relating the assembly method to the static and dynamic properties and behavior of the modified interface, (iii) description of selective approaches towards surface modification or removal of adsorbed structures, (iv) correlation between surface non-uniformity and biorecognition capability.
Last update: Dec 28, 2015