Graphene-Enhanced Infrared Near-Field Microscopy

Li, Peining; Wang, Tao; Böckmann, Hannes; Taubner, Thomas

doi:10.1021/nl501376a

Cited by 51 publications

(35 citation statements)

References 39 publications

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“…In our case, this likely results in nano-FTIR spectra that are mostly dominated by IR features of species in the EDL and diffuse layer regions, rather than the bulk solution. Fourth, and lastly, is the possibility of graphene-based plasmonic enhancement 56,57 . Although there is no apparent wavelengthdependent enhancement in the 700-2000 cm -1 region, as indicated by the close agreement between the ATR-FTIR and nano-FTIR relative peak heights of PC in Figure 3(c), we cannot exclude the possibility of a wavelength-dependent enhancement in the salt solution because adsorption of sulfate or ammonium species to graphene could alter the graphene doping and shift the plasmon frequency.…”

Section: C) Graphene -Ionic Salt Solution Interfacementioning

confidence: 99%

Infrared Nanospectroscopy at the Graphene–Electrolyte Interface

Lu¹,

Larson²,

Baskin³

et al. 2019

Nano Lett.

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We present a new methodology that enables studies of the molecular structure of graphene–liquid interfaces with nanoscale spatial resolution. It is based on Fourier transform infrared nanospectroscopy (nano-FTIR), where the infrared (IR) field is plasmonically enhanced near the tip apex of an atomic force microscope (AFM). The graphene seals a liquid electrolyte reservoir while acting also as a working electrode. The photon transparency of graphene enables IR spectroscopy studies of its interface with liquids, including water, propylene carbonate, and aqueous ammonium sulfate electrolyte solutions. We illustrate the method by comparing IR spectra obtained by nano-FTIR and attenuated total reflection (which has a detection depth of a few microns) demonstrating that the nano-FTIR method makes it possible to determine changes in speciation and ion concentration in the electric double and diffuse layers as a function of bias.

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Section: C) Graphene -Ionic Salt Solution Interfacementioning

confidence: 99%

Infrared Nanospectroscopy at the Graphene–Electrolyte Interface

Lu¹,

Larson²,

Baskin³

et al. 2019

Nano Lett.

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“…low loss) superlens. 178 In 2012, a broadband layered graphene lens was proposed which displayed a simulated resolution of over λ/10. 179 Particular applications of graphene superlenses include noninvasive imaging of nanowire doping concentrations, material growth defects, subcellular biological imaging, vibrational absorption microscopy, and material identification.…”

Section: B Leveraging Superlensing and Near-field Optics For Imagingmentioning

confidence: 99%

Review of near-field optics and superlenses for sub-diffraction-limited nano-imaging

2016

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Near-field optics and superlenses for imaging beyond Abbe's diffraction limit are reviewed. A comprehensive and contemporary background is given on scanning near-field microscopy and superlensing. Attention is brought to recent research leveraging scanning near-field optical microscopy with superlenses for new nano-imaging capabilities. Future research directions are explored for realizing the goal of low-cost and high-performance sub-diffraction-limited imaging systems. © 2016 Author(s)

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“…[16][17][18][19][26][27][28] Hereby, the graphene/SiO 2 heterostructure gained a lot of attention [16][17][18]26 demonstrating the direct coupling of the graphene Dirac Plasmons to the SiO 2 surface phonons. s-SNOM also has been used to study the interaction between the surface polaritons of h-BN nanotubes with the plasmons of single graphene layer 19 observing SPPP coupling.…”

Section: Introductionmentioning

confidence: 99%

Graphene/h-BN plasmon–phonon coupling and plasmon delocalization observed by infrared nano-spectroscopy

et al. 2015

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We observed the coupling of graphene Dirac plasmons with different surfaces using scattering-type scanning near-field optical microscopy integrated into a mid-infrared synchrotron-based beamline. A systematic investigation of a graphene/hexagonal boron nitride (h-BN) heterostructure is carried out and compared with the well-known graphene/SiO2 heterostructure. Broadband infrared scanning near-field optical microscopy imaging is able to distinguish between the graphene/h-BN and the graphene/SiO2 heterostructure as well as differentiate between graphene stacks with different numbers of layers. Based on synchrotron infrared nanospectroscopy experiments, we observe a coupling of surface plasmons of graphene and phonon polaritons of h-BN (SPPP). An enhancement of the optical band at 817 cm(-1) is observed at graphene/h-BN heterostructures as a result of hybridization between graphene plasmons and longitudinal optical phonons of h-BN. Furthermore, longitudinal optical h-BN modes are preserved on suspended graphene regions (bubbles) where the graphene sheet is tens of nanometers away from the surface while the amplitude of transverse optical h-BN modes decrease.

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Graphene-Enhanced Infrared Near-Field Microscopy

Cited by 51 publications

References 39 publications

Infrared Nanospectroscopy at the Graphene–Electrolyte Interface

Infrared Nanospectroscopy at the Graphene–Electrolyte Interface

Review of near-field optics and superlenses for sub-diffraction-limited nano-imaging

Graphene/h-BN plasmon–phonon coupling and plasmon delocalization observed by infrared nano-spectroscopy

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