Near-Field Infrared Spectroscopy of Nanomaterials

Authors:

Haoyang Harlan Huang, Ibrahim Abdelwahab, William Wilson

Date Created:

2025-01-01

Course Title:

Professor:

Not specified

About Paper:

The ability to probe infrared fingerprint spectra down to phase by integrating a graphene-based liquid cell (GLC) system, nanoscale is crucial for advancing applications in nano-optics, which provides a sealed and infrared-transparent environment for biosensing, and quantum materials. However, conventional far- in-liquid nanoimaging. Previously, the near-field investigation in field techniques are fundamentally diffraction-limited. This study aqueous environments has been hindered by the strong absorption addresses the gap in near-field imaging of nanomaterials both in of water. The platform enabled us to acquire spatially resolved gas phase and liquid phase. near-field data of AuNPs and BNNTs suspended in water— We employed a multimodal approach combining atomic force demonstrating, to our knowledge, the first in-liquid s-SNOM microscopy (AFM), transmission electron microscopy (TEM), and imaging of these non-biological nanomaterials. scattering-type scanning near-field optical microscopy (s-SNOM) These results confirm that near-field optical spectroscopy can to investigate the morphology and optical properties of gold be extended into the liquid phase for a broader range of nanoparticles (AuNPs) and boron nitride nanotubes (BNNTs) in nanomaterials. Our ongoing efforts focus on J-aggregates, aiming the solid state. Near-field infrared amplitude and phase images to investigate exciton-polariton interactions in both solid and were collected using a mid-infrared laser source, providing spatial aqueous environments. These works pave the way for label-free resolution below 20 nm. spectroscopy of polaritonic phenomena in chemically relevant and Building upon this foundation, we extended our study to the liquid biologically accessible systems.

Abstract:

The ability to probe infrared fingerprint spectra down to phase by integrating a graphene-based liquid cell (GLC) system, nanoscale is crucial for advancing applications in nano-optics, which provides a sealed and infrared-transparent environment for biosensing, and quantum materials. However, conventional far- in-liquid nanoimaging. Previously, the near-field investigation in field techniques are fundamentally diffraction-limited. This study aqueous environments has been hindered by the strong absorption addresses the gap in near-field imaging of nanomaterials both in of water. The platform enabled us to acquire spatially resolved gas phase and liquid phase. near-field data of AuNPs and BNNTs suspended in water— We employed a multimodal approach combining atomic force demonstrating, to our knowledge, the first in-liquid s-SNOM microscopy (AFM), transmission electron microscopy (TEM), and imaging of these non-biological nanomaterials. scattering-type scanning near-field optical microscopy (s-SNOM) These results confirm that near-field optical spectroscopy can to investigate the morphology and optical properties of gold be extended into the liquid phase for a broader range of nanoparticles (AuNPs) and boron nitride nanotubes (BNNTs) in nanomaterials. Our ongoing efforts focus on J-aggregates, aiming the solid state. Near-field infrared amplitude and phase images to investigate exciton-polariton interactions in both solid and were collected using a mid-infrared laser source, providing spatial aqueous environments. These works pave the way for label-free resolution below 20 nm. spectroscopy of polaritonic phenomena in chemically relevant and Building upon this foundation, we extended our study to the liquid biologically accessible systems.

Source:

Harvard / South Mountain Community College | Mechanical Engineering | 2027 / 2025

Topics:

near, phase, infrared, nanomaterial, liquid, spectroscopy, environment, microscopy, optical, system, aqueou, imaging

Co-authors:

@haoyangharlanhuang425 , @ibrahimabdelwahab426 , @williamwilson427