The relative importance of x-rays alone and of x-ray-generated primary and secondary electrons in damaging organic materials was explored by use of self-assembled monolayers (SAMs) on multilayer thin-film supports. The substrates were prepared by the deposit of thin films of silicon (0, 50, 100, and 200 angstroms) on thick layers of gold (2000 angstroms). These systems were supported on chromiu...

Thiol self-assembled monolayers (SAMs) are widely used in many nano- and bio-technology applications. We report a new approach to create and characterize a thiol SAMs micropattern with alternating charges on a flat gold-coated substrate using atomic force microscopy (AFM) and Kelvin probe force microscopy (KPFM). We produced SAMs-patterns made of alternating positively charged, negatively charg...

Self-Assembled monolayers, or SAMs, of cage molecules are useful in the construction of nanostructures and nanodevices. For the purposes of nanofabrication, it is useful to monitor the formation of defects in these SAMs and differences in molecular lattice orientation. Through autonomous and supervised image processing, this project aims to segment STM images of SAMs of cage molecules into doma...

The formation of interface dipoles in self-assembled monolayers (SAMs) of –CH3 and –CF3 terminated short-chain alkanethiolates on Ag(111) is studied by means of density functional theory calculations. The interface dipoles are characterized by monitoring the change in the surface work function upon adsorption of the SAM. We compare results obtained for SAMs in structures with a different packin...

Abstract: The continuously growing functionality of digital video surveillance make the surveillance system integrate more streaming processors for serving more cameras to recoding their raw video streaming data. But the memory subsystem can not provide necessary bandwidth and become the bottleneck of whole system. Therein how to improve the performance of the accessing memory will become a maj...

We report a comparative study of the structure and frictional properties of self-assembled monolayers (SAMs) generated by the adsorption of three homologous 17-carbon alkanethiolssheptadecanethiol, 2,2dipentadecyl-1,3-propanedithiol, and 2-pentadecyl-1,3-propanedithiolsonto the surface of Au(111). The structural properties of these SAMs were characterized by atomic force microscopy, surface inf...

Graphene oxide (GO) flakes were self-assembled from solution on surfaces of self-assembled monolayers (SAMs), varying in the chemical structure of their head groups. The coverage density of GO relates to strength of attractive interaction, which is largest for Coulomb interaction provided by positively charged SAM head groups and negatively charged GO. A rough surface enhances the coverage dens...

We present the Federation Semantic Attribute Mapping System (F-SAMS), a web services based system which enables a semiautomated dynamic trust establishment mechanism for managing identity federations. We present the conceptual model which allows current members to dynamically introduce new members into the federation in a trustworthy manner, using a web of trust model. F-SAMS enables existing m...

Inkjet printing allows localized, contact-free deposition of liquids onto arbitrary substrates. In this article we demonstrate the fast formation of high-quality self-assembled monolayers (SAMs) on gold surfaces. Using a selective etch process, we verify the uniformity of the deposited spots. A direct comparison with microcontact-printed SAMs on Au revealed similar resist quality as inkjet-depo...

The use of self-assembled monolayers (SAMs) to improve and tailor the photovoltaic performance of plasmonic hot-electron Schottky solar cells is presented. SAMs allow the simultaneous control of open-circuit voltage, hot-electron injection and short-circuit current. To that end, a plurality of molecule structural parameters can be adjusted: SAM molecule's length can be adjusted to control plasm...