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SUMMARY:Everything You Need To Know About TERS And More
LOCATION:Chemistry A101
TZID:America/Denver
DTSTART:20240424T160000
UID:2026-04-28-18-31-19@natsci.colostate.edu
DTSTAMP:20260428T183119
Description:About the Seminar:\n\nThe manipulation of light near the apex o
 f a metallic nano-tip has enabled single molecule detection\, identificati
 on\, and imaging. The distinct advantages of the so-called tip-enhanced op
 tical nano-spectroscopy/nano-imaging approaches are self-evident: ultra-hi
 gh spatial resolution (nanometer or better) and the ultimate sensitivity (
 down to yoctomolar) are both attainable\, all while retaining the ability 
 to chemically fingerprint one molecule at a time (e.g.\, through Raman sca
 ttering). An equally interesting aspect of the same approach stems from us
 ing the properties of molecules to characterize the environments in which 
 they reside. This concept of spectroscopy on the left hand side of the Sch
 rödinger equation is certainly not novel and has been discussed in pionee
 ring single molecule studies that ultimately led to a Nobel prize in chemi
 stry. That said\, local environment mapping through ultrasensitive optical
  spectroscopy acquires a unique flavor when executed using tip-enhanced Ra
 man scattering (TERS). TERS on the left hand side of the Schrödinger equa
 tion is the major topic of this talk. The talk will also highlight complem
 entary multimodal (non)linear nano-optical measurements that target plasmo
 nic nanoparticles and nanostructures\, and that are aimed at visualizing a
 nd understanding the nanoscopic optical fields that allow enhanced nano-sp
 ectroscopy and nano-imaging of molecular and materials systems.\n\n\n\nAbo
 ut the Speaker:\n\nPatrick El-Khoury received a BS in chemistry from the A
 merican University of Beirut (2003−2006\, advisor: B. R. Kaafarani)\, a 
 doctorate in photochemical sciences from Bowling Green State University (2
 006−2010\, advisor: A. N. Tarnovsky)\, and postdoctoral training at the 
 University of California\, Irvine (2010−2012\, advisor: V. A. Apkarian).
  Soon after\, he joined Pacific Northwest National Laboratory (PNNL) as a 
 Linus Pauling Distinguished Postdoctoral Research fellow (2013−2016\, me
 ntor: Wayne P. Hess). Currently\, Patrick is a staff scientist in the Chem
 ical Physics and Analysis group\, within the Physical Sciences Division at
  PNNL. Among other things\, he spends his days worrying about (bio)molecul
 es\, plasmons\, and their interactions as gauged through tip-enhanced opti
 cal nanospectroscopy and nanoimaging. 4:00 pm
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