AVS 50th International Symposium
    Processing at the Nanoscale Thursday Sessions
       Session PN-ThA

Paper PN-ThA8
UHV Characterization of Adsorbates Deposited in Ambient from Solution onto Si(001):H-(2x1)

Thursday, November 6, 2003, 4:20 pm, Room 317

Session: Molecular Monolayers
Presenter: L.A. Baker, Naval Research Laboratory
Authors: L.A. Baker, Naval Research Laboratory
A. Laracuente, Naval Research Laboratory
L.J. Whitman, Naval Research Laboratory
Correspondent: Click to Email
The marriage of nanoscale organic components with semiconductor devices for molecular electronics and sensing applications requires new approaches to fabrication. For example, whereas most device fabrication occurs in an ultra-high vacuum (UHV) system, organic materials chemistry often begins in a solution-filled beaker. We are using H-terminated Si(001) prepared in UHV as a robust substrate for ambient surface chemistry that can subsequently be characterized in UHV by STM. As demonstrated by Hersam, et al.,@footnote 1@ Si(001) terminated with H in UHV can be removed to an ambient environment for hours and still appear as a relatively clean, well-ordered Si(001):H-(2x1) surface upon return to UHV. We now find that this surface can be exposed in ambient to chlorinated solvents (e.g., CHCl@sub 3@) with minimal surface modification observed following reintroduction to UHV. In addition, we will present results showing that organic molecules, such as porphyrins, can be deposited in this way and subsequently characterized in UHV with STM. @FootnoteText@@footnote 1@M. C. Hersam, et al., Appl. Phys. Lett. 78, 7 (2001).