Surface vibrational spectroscopy of molecular adsorbates on metals and semiconductors by infrared-visible sum-frequency generation

Superfine, R.; Guyot‐Sionnest, Philippe; Hunt, James B.; Kao, C.-T.; Shen, Y. R.

doi:10.1016/0039-6028(88)90422-0

Cited by 61 publications

(30 citation statements)

References 13 publications

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“…133,134 This plasmon-enhanced SHG was readily generalized to sum frequency generation, particular surface vibrational spectroscopy, in order to study information of adsorbed molecules on metal surfaces. 135,136 For example, with the help of surface vibrational spectroscopy and plasmonic resonance at electrochemical interfaces, in situ and real-time vibrational spectra were measured, revealing the electrochemical reaction process of how the surface was oxidized and reduced every cyclic voltammetry cycle. 137 Nonlinear optical effects in metamaterials or metasurfaces have attracted intensive interest recently.…”

Section: Photocatalysismentioning

confidence: 99%

Plasmon-enhanced light–matter interactions and applications

et al. 2019

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Surface plasmons are coherent and collective electron oscillations confined at the dielectric-metal interface. Benefitting from the inherent subwavelength nature of spatial profile, surface plasmons can greatly accumulate the optical field and energy on the nanoscale and dramatically enhance various light-matter interactions. The properties of surface plasmons are strongly related to materials and structures, so that metals, semiconductors and two-dimensional materials with various morphologies and structures can have alternating plasmonic wavelengths ranging from ultraviolet, visible, near infrared to far infrared. Because the electric field can be enhanced by orders of magnitude within plasmonic structures, various light-matter interaction processes including fluorescence, Raman scattering, heat generation, photoacoustic effects, photocatalysis, nonlinear optical conversion, and solar energy conversion, can be significantly enhanced and these have been confirmed by both theoretical, computational and experimental studies. In this review, we present a concise introduction and discussion of various plasmon-enhanced light-matter interaction processes. We discuss the physical and chemical principles, influencing factors, computational and theoretical methods, and practical applications of these plasmon-enhanced processes and phenomena, with a hope to deliver guidelines for constructing future high-performance plasmonic devices and technologies.

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Section: Photocatalysismentioning

confidence: 99%

Plasmon-enhanced light–matter interactions and applications

et al. 2019

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“…The 1064 nm beam and IR beam overlap temporally and spatially at incidence angles of 60° and 70°, respectively. Since the χ zzz component dominates the SFG process on metal surfaces, [35] the polarization combination named as PPP (the polarization of two incident beams is set to be parallel with the incidence plane, as well as the polarization of SFG beam) is chosen in this work. A reflection configuration is set up with an emission angle of SFG signal at about 62.1° with respect to the surface normal to collect the intermediated SFG beam profile.…”

Section: Sfgim Set Upmentioning

confidence: 99%

“…Previous studies indicate that the non-resonant background has a direct relationship with surface electronic properties of the metal substrate. [10,32,35,46] The exposure of oxygen gas to pure copper would introduce the formation of copper oxide on surface, [47] which changes the surface electronic properties and non-resonant response. [46,48] The SFG signal (IR wavenumber: 3000 cm -1 ) correlates with oxygen introduction time.…”

Section: Sfg Spectroscopy and Peak Assignmentmentioning

confidence: 99%

Roles of oxygen for methanol adsorption on polycrystalline copper surface revealed by sum frequency generation imaging microscopy

et al. 2016

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The adsorption of atmospheric pressure methanol on the polycrystalline copper surface has been studied by a combination of sum frequency generation imaging microscopy (SFGIM) and temperature programmed desorption (TPD). Methoxy species can be generated by exposing the polycrystalline copper surface to methanol vapor at room temperature. SFGIM results demonstrate that oxygen promotes the surface adsorption of methanol and the increase in the amount of methoxy produced on copper surface. SFGIM orientation analysis suggests the methoxy monolayer is oriented closer to the surface normal with introduction of oxygen. Employing the image statistical analysis approach, the heterogeneities and conformation distribution of methoxy monolayers on copper surface with and without oxygen adsorption are compared. These results illustrate SFGIM indeed could provide more insight for understanding the heterogeneous metal/metal oxide surface in the molecular level.

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“…Typically, χ (2) NR is real for common dielectric surfaces and can be considered constant over a limited frequency band [23], but χ (2) R,ν is a complex quantity, and its tensorial components in the surface-fixed axis system i, j and k can be macroscopically described as a Lorentzian [13,24] (χ (2) R,ν ) ij k ∝…”

Section: Sum-frequency Generation At Interfacesmentioning

confidence: 99%

In situnon-linear spectroscopic approaches to understanding adsorption at mineral–water interfaces

Schrödle¹,

Richmond²

2008

J. Phys. D: Appl. Phys.

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Over the last decades, significant advances have been made in the study of adsorption processes at mineral-water interfaces. In particular, surface-enhanced infrared (IR) techniques, and, more recently, non-linear vibrational sum-frequency spectroscopy have provided novel insights into the structure and dynamics of these interfaces. The driving forces behind adsorption at mineral substrates are as diverse as the set of commonly encountered adsorbates, which range from simple inorganic ions to organic molecules from the smallest to the largest polymers. Electrostatics, cooperative processes, self-assembly into mesoscopically ordered aggregates and specific chemical interactions all play an important role. In this topical review, particular consideration is given to organic adsorbates including surfactants, because of their eminent technological importance for the modification of surface properties and their omnipresence in the environment. This review demonstrates that non-linear optical methods greatly extend the well-established linear IR techniques and provide many opportunities for surface science to advance our understanding of the structure and dynamics of mineral-water interfaces.

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Surface vibrational spectroscopy of molecular adsorbates on metals and semiconductors by infrared-visible sum-frequency generation

Cited by 61 publications

References 13 publications

Plasmon-enhanced light–matter interactions and applications

Plasmon-enhanced light–matter interactions and applications

Roles of oxygen for methanol adsorption on polycrystalline copper surface revealed by sum frequency generation imaging microscopy

In situnon-linear spectroscopic approaches to understanding adsorption at mineral–water interfaces

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