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Related Concept Videos

Super-resolution Fluorescence Microscopy01:37

Super-resolution Fluorescence Microscopy

Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been developed.
Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
IR Spectrum Peak Splitting: Symmetric vs Asymmetric Vibrations01:08

IR Spectrum Peak Splitting: Symmetric vs Asymmetric Vibrations

Identical bonds within a polyatomic group can stretch symmetrically (in-phase) or asymmetrically (out-of-phase). Similar to hydrogen bonding, these vibrations also influence the shape of the IR peak. Generally, asymmetric stretching frequencies are higher than symmetric stretching frequencies. For example, primary amines exhibit two distinct IR peaks between 3300–3500 cm−1 corresponding to the symmetric and asymmetric N-H stretching, while secondary amines exhibit a single stretching vibration...
IR Frequency Region: Fingerprint Region01:03

IR Frequency Region: Fingerprint Region

IR spectra are divided into two main regions: the diagnostic region and the fingerprint region. The diagnostic region of the spectrum lies above 1500 cm−1. The absorptions resulting from single-bond vibrations of the N–H, C–H, and O–H stretch at higher wavenumbers and appear on the left side of the spectrum. The stretching absorptions of the C≡C and C≡N occur between 2100–2300 cm−1. In contrast, those arising from stretching absorptions of the C=O, C=N, and C=C occur between 1600–1850 cm−1.
The...

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Related Experiment Video

Updated: May 10, 2026

A Multimodal Wide-Field Fourier-Transform Raman Microscope
06:48

A Multimodal Wide-Field Fourier-Transform Raman Microscope

Published on: December 30, 2025

Rapid spectral-domain localization.

Thomas van Dijk1, David Mayerich, Rohit Bhargava

  • 1Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, USA.

Optics Express
|June 6, 2013
PubMed
Summary
This summary is machine-generated.

This study introduces a new method for dynamic nanoscale imaging using spectral multiplexing of engineered nanoprobes, overcoming slow data acquisition in current super-resolution microscopy techniques.

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Automated Two-dimensional Spatiotemporal Analysis of Mobile Single-molecule FRET Probes

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Area of Science:

  • Optical microscopy
  • Nanotechnology
  • Spectroscopy

Background:

  • Current super-resolution microscopy techniques like PALM/STORM rely on temporal separation of signals, limiting imaging speed.
  • Dynamic biological systems require faster imaging methods to capture transient processes.
  • Far-field microscopy faces challenges in achieving high spatial resolution for dynamic events.

Purpose of the Study:

  • To develop a novel method for dynamic imaging at nanometer spatial resolution using far-field instruments.
  • To overcome the limitations of slow data acquisition inherent in current super-resolution techniques.
  • To enable the imaging of dynamic systems with resolution limited only by probe size.

Main Methods:

  • Utilizing engineered nanoprobes with distinct spectral responses.
  • Measuring coherent scattering signals instead of fluorescence.
  • Employing spectral domain multiplexing for simultaneous data acquisition.

Main Results:

  • Demonstrated a method for dynamic imaging at nanometer resolution.
  • Successfully distinguished signals from distinct probes in the spectral domain.
  • Circumvented the bottleneck of slow data acquisition in super-resolution imaging.

Conclusions:

  • The proposed method enables faster data acquisition for super-resolution microscopy.
  • Spectral multiplexing offers a viable alternative to temporal separation for probe discrimination.
  • This technique has significant potential for imaging fast dynamic processes at the nanoscale.