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Papers
61,005 resultsShowing papers similar to Photo induced force microscopy: chemical spectroscopy beyond the diffraction limit
ClearPhotoinduced Force Microscopy as an Efficient Method Towards the Detection of Nanoplastics
Researchers demonstrated photoinduced force microscopy as an effective method for detecting and chemically characterizing individual nanoplastic particles, overcoming limitations of conventional techniques that lack either sufficient spatial resolution or spectroscopic capability at the nanoscale.
Far-field super-resolution chemical microscopy
Researchers reviewed recent advances in "far-field chemical microscopy," a group of techniques that create detailed molecular maps of materials without needing dyes or labels, while also breaking the traditional limits of optical resolution. These super-resolution chemical imaging methods are opening new windows for studying biological systems, identifying environmental contaminants like microplastics, and inspecting materials at the nanoscale.
Boxcar Averaging Scanning Nonlinear Dielectric Microscopy
This paper describes improvements to scanning nonlinear dielectric microscopy combined with atomic force microscopy for high-resolution surface characterization. The technique is relevant to materials science rather than environmental microplastic research.
Advances in assembled micro- and nanoscale mechanical contact probes
This review examined advances in assembled micro- and nanoscale mechanical contact probes used for characterizing surface properties and behavior, covering their development, diversification, and applications in physical and biological science for mapping surface and interface phenomena at nanometer resolution.
Vibrational photothermal imaging from single molecules to human subjects (Conference Presentation)
This conference presentation reviews vibrational photothermal microscopy—a label-free technique using infrared pump and visible probe beams—as a tool for imaging chemical bonds in biological systems including bacteria, cells, and organisms. The technique enables real-time chemical mapping without fluorescent labels and has been applied to detect micro- and nanoplastics in biological tissues.
Spectroscopic Microtomography in the Short-Wave Infrared Wavelength Range
Researchers demonstrated spectroscopic microtomography in the short-wave infrared range using digital holographic tomography, achieving 1.51 micron resolution for 3D chemical and structural imaging of microscopic specimens including human hair and sea urchin embryos.
Principles and Applications of Vibrational Spectroscopic Imaging in Plant Science: A Review
This review covers the principles and applications of vibrational spectroscopic imaging techniques including infrared and Raman spectroscopy in plant science, highlighting their capacity to provide spatially distributed chemical information from organ to sub-cellular scales without destructive sampling. The authors survey applications across plant biochemistry, structural analysis, and secondary metabolite localization, demonstrating the utility of these methods for both basic and applied botanical research.
A Review of the Current State of Magnetic Force Microscopy to Unravel the Magnetic Properties of Nanomaterials Applied in Biological Systems and Future Directions for Quantum Technologies
This review covers magnetic force microscopy, a technique that can detect and map magnetic properties at the nanoscale in biological systems. Researchers highlight its applications in studying magnetic nanoparticles used in drug delivery, cell imaging, and biosensing. While primarily a methods review, the technology has potential relevance for characterizing magnetic micro- and nanoparticles, including some types of environmental contaminants.
Overcoming resolution limitations: Spectroscopy of sub-30 nm nanoplastics
Researchers developed a multi-technique approach combining standard micro-Raman spectroscopy with atomic force microscopy to characterize nanoplastics as small as 25 nm, achieving a mass detection limit of 8.6 attograms and demonstrating the capability to obtain single-particle spectra from sub-30 nm polystyrene nanoparticles.
Photothermal Microscopy and Spectroscopy with Nanomechanical Resonators
This paper is not relevant to microplastics — it describes advances in nanomechanical photothermal microscopy and spectroscopy as analytical techniques for measuring light absorption at the nanoscale, with no application to plastic pollution.
Overcoming resolution limitations: Spectroscopy of sub-30 nm nanoplastics
Researchers developed a multi-technique approach combining standard micro-Raman spectroscopy with atomic force microscopy to characterize nanoplastics as small as 25 nm, achieving a mass detection limit of 8.6 attograms and demonstrating the capability to obtain single-particle spectra from sub-30 nm polystyrene nanoparticles.
Performance of a Portable FT-NIR MEMS Spectrometer to Predict Soil Features
Researchers evaluated a portable FT-NIR spectrometer based on micro-electromechanical systems technology for predicting soil properties, finding it performed comparably to laboratory instruments for several key soil features while offering the advantages of portability and lower cost for agricultural monitoring.
Tuning the infrared resonance of thermal emission from metasurfaces working in near-infrared
Researchers designed and tested a metasurface — a precisely engineered array of tiny metal structures — that can control the wavelength of infrared light emitted or absorbed, demonstrating that adjusting the geometry and orientation of the structures allows fine-tuned control of the thermal emission spectrum for potential sensing and imaging applications.
Nanoscale infrared, thermal and mechanical properties of aged microplastics revealed by an atomic force microscopy coupled with infrared spectroscopy (AFM-IR) technique
Researchers used atomic force microscopy coupled with infrared spectroscopy (AFM-IR) to characterize nanoscale infrared, thermal, and mechanical properties of TiO2-pigmented microplastics before and after aging, finding that weathering roughened surfaces and altered carbonyl and methylene band intensities.
Picogram-Level Nanoplastic Analysis with Nanoelectromechanical System Fourier Transform Infrared Spectroscopy: NEMS-FTIR
Researchers developed a NEMS-FTIR approach combining nanoelectromechanical systems with Fourier transform infrared spectroscopy for chemical characterization and quantification of nanoplastics, achieving picogram-level detection limits ranging from 101 to 353 pg for polypropylene, polystyrene, and polyvinyl chloride nanoplastics with diameters from 54 to 262 nm.
Analysis of environmental microplastics by vibrational microspectroscopy: FTIR, Raman or both?
This study reviewed analytical methods for environmental microplastic analysis using vibrational microspectroscopy — comparing FTIR, Raman, and related techniques — and provided guidance on method selection for different sample types and research questions.
A Universal Approach to Mie Scatter Correction inFTIR Analysis of Microsized Samples
Researchers developed a universal computational approach to correct for Mie scattering distortions in FTIR infrared microspectroscopy of microsized samples, including microplastics. The method recovers accurate chemical information from spectra that would otherwise be distorted by optical effects from particle size and shape.
Sub-10 nm Nanoparticle Detection Using Multi-Technique-Based Micro-Raman Spectroscopy
Researchers combined standard micro-Raman spectroscopy with atomic force microscopy to detect individual nanoparticles as small as 9 nm — a size range that until now required far more complex and time-consuming instruments. This advance matters for microplastic research because plastics continuously fragment into nanoplastics, and having accessible tools to characterise these ultra-small particles is essential for understanding their environmental distribution and biological uptake.
Broadband background-free stimulated Raman scattering microspectroscopy with a novel frequency modulation scheme
Researchers developed broadband background-free stimulated Raman scattering microspectroscopy using a novel laser system, enabling chemical imaging without the fluorescence background that limits conventional Raman measurements. The technique offers improved sensitivity for detecting microplastics and other materials in complex biological samples.
Atomic spectrometry update: review of advances in the analysis of metals, chemicals and materials
This review covers recent advances in analytical methods for characterising advanced materials, metals, fuels, lubricants, nanostructures, ceramics, and chemicals, encompassing X-ray, ICP, LIBS, mass spectrometry, synchrotron-based, and surface ablation techniques applied across industrial and research contexts.
Super-resolution imaging of micro- and nanoplastics using confocal Raman with Gaussian surface fitting and deconvolution
Researchers used confocal Raman imaging with Gaussian surface fitting to achieve super-resolution visualization of micro- and nanoplastics beyond the optical diffraction limit, enabling identification and imaging of nanoplastic particles smaller than conventional Raman microscopy can resolve.
PhotothermalInfrared Imaging of Nanoplastics in HumanCells with Nanoscale Resolution
Researchers used photothermal infrared imaging with nanoscale resolution to detect and localize polystyrene nanoparticles inside individual human fibroblast and glioblastoma cells, overcoming the size limitation of conventional FTIR and enabling sub-100 nm nanoplastic localization in cells.
Identification and visualisation of microplastics/ nanoplastics by Raman imaging (ii): Smaller than the diffraction limit of laser?
Researchers examined whether confocal Raman microscopy can identify and visualize nanoplastics smaller than the diffraction limit of the laser, analyzing the lateral intensity distribution of Raman signals from nanoplastics ranging from approximately 30 to 600 nm in diameter. The study found that while imaging resolution is limited by diffraction, chemical identification of sub-diffraction-limit nanoplastics remains possible.
Controlled Detection for Micro- and Nanoplastic Spectroscopy/Photometry Integration Using Infrared Radiation
Researchers proposed a controlled infrared spectroscopy/photometry integration system for detecting micro- and nanoplastics, using a diffraction grating controller to tune the geometry etendue of the display unit and yield a universal spectrometer/photometer capable of identifying plastic particles across size ranges.