TY - JOUR
T1 - Nanoscale chemical imaging of a dynamic molecular phase boundary with ultrahigh vacuum tip-enhanced raman spectroscopy
AU - Jiang, Nan
AU - Chiang, Naihao
AU - Madison, Lindsey R.
AU - Pozzi, Eric A.
AU - Wasielewski, Michael R.
AU - Seideman, Tamar
AU - Ratner, Mark A.
AU - Hersam, Mark C.
AU - Schatz, George C.
AU - Van Duyne, Richard P.
N1 - Funding Information:
N.J., N.C., T.S., M.C.H., and R.P.V.D. acknowledge support from the Department of Energy Office of Basic Energy Sciences (SISGR Grant DE-FG02-09ER16109). L.R.M. and E.A.P. acknowledges support from the National Science Foundation Graduate Research Fellowship under Grant DGE-1324585 and the National Science Foundation Materials Research Science and Engineering Center (DMR-1121262). L.R.M., G.C.S., and R.P.V.D. acknowledge support from the National Science Foundation Center for Chemical Innovation dedicated to Chemistry at the Space-Time Limit (CaSTL) Grant CHE- 1414466. Additional support for facilities and instrumentation was provided by the National Science Foundation (CHE- 1414466, DMR-1121262) and the Department of Energy (DEFG02- 09ER16109). M.R.W. acknowledges the support of the Chemical Sciences, Geosciences, and Biosciences Division, Office of Basic Energy Sciences, Department of Energy under Grant DE-FG02-99ER14999.
Publisher Copyright:
© 2016 American Chemical Society.
PY - 2016/6/8
Y1 - 2016/6/8
N2 - Nanoscale chemical imaging of a dynamic molecular phase boundary has broad implications for a range of problems in catalysis, surface science, and molecular electronics. While scanning probe microscopy (SPM) is commonly used to study molecular phase boundaries, its information content can be severely compromised by surface diffusion, irregular packing, or three-dimensional adsorbate geometry. Here, we demonstrate the simultaneous chemical and structural analysis of N-N′-bis(2,6-diisopropylphenyl)-1,7-(4′-t-butylphenoxy)perylene-3,4:9,10-bis(dicarboximide) (PPDI) molecules by UHV tip-enhanced Raman spectroscopy. Both condensed and diffusing domains of PPDI coexist on Ag(100) at room temperature. Through comparison with time-dependent density functional theory simulations, we unravel the orientation of PPDI molecules at the dynamic molecular domain boundary with unprecedented ∼4 nm spatial resolution.
AB - Nanoscale chemical imaging of a dynamic molecular phase boundary has broad implications for a range of problems in catalysis, surface science, and molecular electronics. While scanning probe microscopy (SPM) is commonly used to study molecular phase boundaries, its information content can be severely compromised by surface diffusion, irregular packing, or three-dimensional adsorbate geometry. Here, we demonstrate the simultaneous chemical and structural analysis of N-N′-bis(2,6-diisopropylphenyl)-1,7-(4′-t-butylphenoxy)perylene-3,4:9,10-bis(dicarboximide) (PPDI) molecules by UHV tip-enhanced Raman spectroscopy. Both condensed and diffusing domains of PPDI coexist on Ag(100) at room temperature. Through comparison with time-dependent density functional theory simulations, we unravel the orientation of PPDI molecules at the dynamic molecular domain boundary with unprecedented ∼4 nm spatial resolution.
KW - Tip-enhanced Raman spectroscopy (TERS)
KW - dynamic molecular phase boundary
KW - time-dependent density functional theory (TDDFT)
KW - ultrahigh vacuum scanning tunneling microscopy (UHV-STM)
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U2 - 10.1021/acs.nanolett.6b01405
DO - 10.1021/acs.nanolett.6b01405
M3 - Article
AN - SCOPUS:84974539740
VL - 16
SP - 3898
EP - 3904
JO - Nano Letters
JF - Nano Letters
SN - 1530-6984
IS - 6
ER -