Nanomaterials

News and Updates

Tiny New Lasers Fill a Long-Standing Gap in the Rainbow of Visible-Light Colors, Opening New Applications

August 28, 2024

Researchers have created orange, yellow and green lasers tiny enough to fit on a chip.

Bullseye! NIST Devises a Method to Accurately Center Quantum Dots Within Photonic Chips

March 18, 2024

Devices that capture the brilliant light from millions of quantum dots, including chip-scale lasers and optical amplifiers, have made the transition from

Do the Bump: NIST Scientists Perfect Miniaturized Technique to Generate Precise Wavelengths of Visible Laser Light

November 28, 2023

In research, sometimes the bumpy path proves to be the best one. By creating tiny, periodic bumps in a miniature racetrack for light, researchers at the

Projects and Programs

Microplastic and Nanoplastic Metrology

Ongoing

The Micro and Nanoplastic (MNP) Metrology Project aims to develop a toolbox of methods for size-based separations from complex matrices, chemical characterization protocols, and test materials necessary to enable quantification of micro- and nano-sized plastic particles, a need articulated by our

PTIR combines the spatial resolution of AFM with the specificity of absorption spectroscopy

Nano-Chemical Imaging and -Spectroscopy (IR, nIR, VIS)

Ongoing

The aim of this project is twofold: 1) improve the PTIR measurement (spectral range, signal to noise ratio, throughput, time resolution, information content, range of environmental conditions) and 2) apply PTIR to characterize nanomaterials in important applications. Examples or recent PTIR

Comparing the Biological Responses of Photoluminescent Silicon Nanoparticles with Silicon Micron-sized Particles

Ongoing

Intended Impact Technology is now available to produce nanoparticles of uniform size and shape which may allow their use in a wide range of applications from drug delivery to water purification. The high surface area to volume ratio of nanoparticles makes them particularly good catalysts as well

Light-matter interactions in Semiconductor Nanostructures

Ongoing

We investigate the interaction of light with semiconductor-based nanostructures. We extend concepts of entanglement and coherence in atomic physics to our solid-state systems. Our devices are based on semiconductors, like GaAs. We use InAs quantum dots (QDs) in GaAs as artificial atoms; they have

Publications

Orthogonal Determination of Competing Surfactant Adsorption onto Single-Wall Carbon Nanotubes During Aqueous Two-Polymer Phase Extraction via Fluorescence Spectroscopy and Analytical Ultracentrifugation

July 31, 2024

Author(s)

Christopher Sims, Jeffrey Fagan

A combination of analytical ultracentrifugation (AUC) and fluorescence spectroscopy are utilized to orthogonally probe compositions of adsorbed surfactant

Solution Synthesis of NdTe3 Magnetic Nanosheets

July 4, 2024

Author(s)

Joel Swanson, Salah El Jamal, Tyler Hartman, Orlando Stewart, Priscilla Glaser, Adam Biacchi, DaVonne Henry, Amy Liu, Sarah Stoll

Neodymium tritelluride is a layered van der Waals material, with correlated electronic properties including high electronic mobility, charge density waves, and

GPU-accelerated parallel image reconstruction strategies for magnetic particle imaging

June 24, 2024

Author(s)

Klaus Natorf Quelhas, Mark-Alexander Henn, Ricardo Farias, Weston L. Tew, Solomon I. Woods

Image reconstruction is a fundamental step in Magnetic Particle Imaging (MPI). Since it was developed, several methods have been studied to perform more

Understanding the Origin and Implication of the Indirect-to-Direct Bandgap Transition in Multilayer InSe

May 2, 2024

Author(s)

Nicholas Pike, Ruth Pachter, Michael Altvater, Chris Stevens, Matthew Klein, Joshua Hendrickson, Huairuo Zhang, Sergiy Krylyuk, Albert Davydov, Nicholas Glavin

Indium selenide (InSe) multilayers have attracted much interest recently due to their electronic and optical properties, partially dependent on the existence of

Software

HolograFREE

An electron hologram is a fringe modulated image containing the amplitude and phase information of an electron transparent object. The HolograFREE routines

Tools and Instruments

Local Electrode Atom Probe Tomography (LEAP)

Field evaporates (with a voltage and laser pulse) a sharp tip-shaped specimen. Collects the ionization products in a position-sensitive, time-of-flight mass

Raman facility

Raman scattering is a powerful light scattering technique used to diagnose the internal structure of molecules and crystals. In a light scattering experiment

Dual Beam Focused Ion Beam / Scanning Electron Microscope (FIB/SEM)

Dual beam focused ion beam/scanning electron microscope (FESEM). Focused ion beam using Ga atoms allows the patterning of objects at ~10 nm level (milling and

Aberration-Corrected Transmission Electron Microscope (TEM)

Probe corrected 200kV analytic electron microscope Resolves single atoms Chemical analytic capability (EELS, EDS) Highest resolution in electron optics (<0.1 nm

Awards

Vincent Hackley Honored by ASTM

In recognition of consistent dedication and outstanding service to ASTM Committee E56 on Nanotechnology since the committee’s inception in

Elijah Petersen Honored with PECASE

For pioneering measurement methods of nanomaterials toxicity that now underpin industry and public sector assessments of the environmental