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Projects/Programs

Topic Area
Displaying 601 - 625 of 1655
Electron microscopy images

GaN Nanowire Growth

Ongoing
Selective epitaxy: We have demonstrated that the diameter and placement of nanowires can be controlled by using silicon nitride (SiNx) masks on top of MBE-grown buffer layers (see figure). With electron beam lithography, several patterns with 3 mm die size that provide over 100,000 controlled
nanowires

GaN Nanowire Metrology and Applications

Ongoing
GaN Nanowire LEDs: Our selective epitaxy methods and dopant characterization techniques have enabled fabrication of arrays of nanowire LEDs with controlled location and spatial layout. This development is complemented by modeling of the carrier flow and recombination. These LEDs were combined to
Photograph of SRM SRM 1694a sulfur dioxide in nitrogen showing a labeled gas cylinder.

Gas Concentration Standards Supporting Atmospheric Monitoring

Ongoing
NIST develops suites of SI-traceable, amount-of-substance, primary gas standard mixtures (PSMs) for key trace and greenhouse gas species to provide traceability to the International System of Units for a range of user communities. Standard Reference Materials (SRMs), certified to the PSMs, are
two-capillary viscometer

Gas properties for flow metering

Ongoing
NIST has two on-line databases that include accurate gas viscosity values: SEMIPROP - NIST Standard Reference Database 134 - for selected semiconductor process gases NIST Chemistry WebBook - for heat transfer fluids, components of air, components of natural gas [Note: as of February 2014, the NIST

Gene Delivery Systems

Ongoing
Viral Vectors Viral vectors are a critical tool for delivering DNA or RNA into patient’s cells. Common viral vectors for gene therapy include adenovirus, lentivirus, and adeno associated virus. Administration of viral vectors can occur in vivo or ex vivo , such as for adeno associated virus or
GIAB Logo

Genome in a Bottle

Ongoing
Consortium goals: The Genome in a Bottle Consortium is a public-private-academic consortium hosted by NIST to develop the technical infrastructure (reference standards, reference methods, and reference data) to enable translation of whole human genome sequencing to clinical practice and innovations

Genome in a Bottle Workshops

Ongoing
GIAB has held 1-2 workshops each year since being formed in 2012. These workshops include progress updates, presentations about related work, and planning for new samples and analyses. Following are links to agendas, reports, and presentations from past workshops. Workshop Reports APRIL 2020
Diagram showing the electro-thermo-mechanical relations in a crystal

Genomics of Electronic Materials

Ongoing
We approach this multidimensional characterization problem by developing measurement-based techniques to rapidly quantify all of the relevant properties of thin-film materials, interfaces, and microelectronic structures. We make extensive use of finite-element simulations, as well as linear and non
Photo of broken laminated windshield glass

Glass Evidence Analysis

Ongoing
Quantitative XRF Glass Database Recent research efforts in the forensic trace field have focused on the development of databases to assign a significance to forensic evidence (i.e., to report the strength of an association or exclusion). In the forensic analysis of glass using µ-XRF, samples are
13 tubes each containing an individual glycan in SRM 3655

Glycan Standard Reference Materials

Ongoing
Now Available A glycan-based NIST Standard Reference Material ( SRM 3655 Glycans in Solution ) supports the biomanufacturing and protein therapeutics communities with a set of 13 individually-bottled, pure glycoforms including those most commonly observed as N-linked glycans on therapeutic

Graphene

Ongoing
Two remarkable features of graphene that are opening avenues to multiple applications are its high transport carrier mobility and the broad tunability of its electronic properties. Graphene charge carriers can be tuned continuously from negative carriers (i.e., electrons) to positive carriers (holes

Grasping, Manipulation, and Contact Safety Performance of Robotic Systems

Ongoing
Objective To provide performance metrics, test methods, and associated measurement tools to support next-generation robotic systems having human-like dexterity and force control characteristics. Technical Idea The force sensing and compliance capabilities used in collaborative robots to prevent
Round circles like red and green grapes on the left have one with the globe. Grapes has the A squared.

GReenhouse Gas And Air Pollutants Emissions System (GRA2PES)

Ongoing
The GReenhouse gas And Air Pollutants Emissions System (GRA2PES) uses publicly accessible GHG emissions activity data across multiple economic sectors, including energy production, manufacturing, transportation, agriculture, and land use, among others. The initiative involves the development of
Scrubber cropped

Greenhouse Gas Emissions and Transport

Completed
This project develops a high-accuracy reference system for near-industrial-scale CO2 measurements, providing a framework for low-uncertainty emissions data and improving atmospheric dispersion models to reduce uncertainties in greenhouse gas source predictions.
GutMicrobiome

Gut Microbiome Metabolomics Interlaboratory Program

Ongoing
On behalf of the Biosystems and Biomaterials and Chemical Sciences Divisions at the National Institute of Standards and Technology (NIST), we would like to thank you for your interest in our new Gut Microbiome Metabolomics Program. As part of the larger NIST Microbiome Program, this metabolomics
Picture for Hardness and Coating Thickness Standardization and Measurements Project Including Equipment and Standards Organizations

Hardness Standardization and Measurements

Ongoing
DESCRIPTION Purpose: Provide measurement traceability for the Knoop, Rockwell, and Vickers hardness scales and for coating thickness measurements that are based on magnetic methods. Goals: Harmonization of hardness and coating thickness testing protocols, in pursuit of reduction of measurement
Microscope image of a crossbar array

Hardware Accelerators for Neural Networks

Ongoing
One promising candidate for building a hardware accelerator comes from the field of spintronics, where information is carried by electronic spin rather than charge. Magnetic tunnel junctions are particularly suited because of their multifunctionality and compatibility with standard integrated
Temporal Chip

Hardware Accelerators for Statistical Computing

Ongoing
Finding good solutions to many hard problems, like combinatorial optimization and traveling salesman problems, counterintuitively requires making the estimated solution worse before making it better. This situation results from many hard problems having many “solutions” that cannot be improved

HDX-MS for Biopharmaceutical Analysis

Ongoing
This project is designed to improve, test, and validate hydrogen/deuterium exchange mass spectrometry (HDX-MS) metrology for the determination of dynamical properties of therapeutic proteins and glycoproteins. The research project uses HDX-MS to measure the D-for-H exchange rates of the amide groups
Circle with the logo of Health Assessment Measurements Quality Assurance Program initials

Health Assessment Measurements Quality Assurance Program (HAMQAP)

Completed
Participants in the HAMQAP measured concentrations of nutritional and toxic elements, fat- and water-soluble vitamins, fatty acids, active and/or marker compounds, and contaminants in samples distributed by NIST.   Samples that represent human intake (e.g., foods, dietary supplements, tobacco) were
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