<!doctype html public "-//W3C//DTD W3 HTML//EN">
<html><head><style type="text/css"><!--
blockquote, dl, ul, ol, li { padding-top: 0 ; padding-bottom: 0 }
--></style><title>November 17, 2009</title></head><body>
<div align="center"><font face="Times New Roman"
color="#000000"><b>Seminar on</b></font></div>
<div align="center"><font face="Times New Roman"
color="#000000"><b><br></b></font></div>
<div align="center"><font face="Times New Roman"
color="#000000"><b>Modern Optics and Spectroscopy</b></font></div>
<div align="center"><font face="Times New Roman"
color="#000000"><b><br></b></font></div>
<div align="center"><font face="Arial" color="#000000"><b>The quest
for chemical contrasts in high resolution microscopy</b></font></div>
<div align="center"><font face="Arial"
color="#000000"><b><br></b></font></div>
<div align="center"><font face="Arial"
color="#000000"><b><br></b></font></div>
<div align="center"><font face="Times New Roman"
color="#000000"><b>Christian Degen</b>, MIT</font></div>
<div align="center"><font face="Times New Roman"
color="#000000"><br></font></div>
<div align="center"><font face="Times New Roman"
color="#000000">Tuesday, November 17, 2009</font></div>
<div align="center"><font face="Times New Roman"
color="#000000"><br></font></div>
<div align="center"><font face="Times New Roman"
color="#000000"><br></font></div>
<div align="center"><font face="Times New Roman" color="#000000">12:00
- 1:00 p.m.</font></div>
<div align="center"><font face="Times"
color="#000000"><br></font></div>
<div align="center"><font face="Times"
color="#000000"><br></font></div>
<div align="center"><font face="Times New Roman"
color="#000000">Adding chemical contrast to the topographic
capabilities of scanning probe microscopy is a longstanding
aspiration, dating back to the early proposals of the technique by
Binnig and Rohrer in 1982. This goal has led to great interest in
combining scanning probes with spectroscopic techniques such as
inelastic tunneling spectroscopy, force spectroscopy, or Raman
spectroscopy, all of which have successfully demonstrated atomic or
molecular identification in certain systems. In general, however,
scanning probe microscopes are not particularly well-equipped to
identify what they are actually imaging.</font></div>
<div align="center"><font face="Times New Roman"
color="#000000"><br></font></div>
<div align="center"><font face="Times New Roman" color="#000000">In
this talk I will discuss our lab's efforts in combining scanning probe
microscopy with the inherent chemical selectivity of nuclear magnetic
resonance (NMR). I will introduce the basics of Magnetic Resonance
Force Microscopy, and show how the technique can be used to detect
different chemical elements. I will then talk about recent efforts at
imaging nanoscale objects in 3D, including magnetic resonance imaging
(MRI) of individual virus particles at a spatial resolution of better
than 10 nm. Finally I will review the recent proposal of optical
diamond magnetometry as an alternative path to nanometer-scale NMR
under ambient conditions.</font></div>
<div align="center"><font face="Times New Roman"
color="#000000"><br></font></div>
<div align="center"><font face="Times New Roman"
color="#000000"><br></font></div>
<div align="center"><font face="Times New Roman" color="#000000">Grier
Room, MIT Bldg 34-401</font></div>
<div align="center"><font face="Times New Roman"
color="#000000">Refreshments served after the lecture</font></div>
</body>
</html>