Nanotechnology: Better Guidance Is Needed to Ensure Accurate Reporting of Federal Research Focused on Environmental, Health, and Safety Risks

Nanotechnology: Better Guidance Is Needed to Ensure Accurate Reporting of Federal Research Focused on Environmental, Health, and Safety Risks

Date: March 31, 2008
Creator: United States. Government Accountability Office.
Description: A letter report issued by the Government Accountability Office with an abstract that begins "The National Nanotechnology Initiative (NNI), administered by the Office of Science and Technology Policy (OSTP), is a multiagency effort intended to coordinate the nanotechnology-related activities of 25 federal agencies that fund nanoscale research or have a stake in the results. Nanotechnology is the ability to control matter at the scale of a nanometer--one billionth of a meter. A key research area funded by some federal agencies relates to potential environmental, health, and safety (EHS) risks that may result from exposure to nanoscale materials. Because of concerns about federal efforts to fund and prioritize EHS research, GAO was asked to determine (1) the extent to which selected agencies conducted such research in fiscal year 2006; (2) the reasonableness of the agencies' and the NNI's processes to identify and prioritize such federal research; and (3) the effectiveness of the agencies' and the NNI's process to coordinate this research. GAO reviewed quantitative and qualitative data from five federal agencies that provided 96 percent of fiscal year 2006 funding for EHS research."
Contributing Partner: UNT Libraries Government Documents Department
Ab Initio Studies of Polarization and Piezoelectricity in Vinylidene Fluoride and BN-Based Polymers

Ab Initio Studies of Polarization and Piezoelectricity in Vinylidene Fluoride and BN-Based Polymers

Date: 2004
Creator: Nakhmanson, Serge M.; Buongiorno Nardelli, Marco & Bernholc, Jerry
Description: Article on ab initio studies of polarization and piezoelectricity in vinylidene fluoride and BN-based polymers.
Contributing Partner: UNT College of Arts and Sciences
Lip-Lip Interactions and the Growth of Multiwalled Carbon Nanotubes

Lip-Lip Interactions and the Growth of Multiwalled Carbon Nanotubes

Date: January 12, 1998
Creator: Buongiorno Nardelli, Marco; Brabec, Charles; Roland, Christopher & Bernholc, Jerry
Description: Article on lip-lip interactions and the growth of multiwalled carbon nanotubes.
Contributing Partner: UNT College of Arts and Sciences
Ad-dimers on Strained Carbon Nanotubes: A New Route for Quantum Dot Formation?

Ad-dimers on Strained Carbon Nanotubes: A New Route for Quantum Dot Formation?

Date: November 15, 1999
Creator: Orlikowski, Daniel; Buongiorno Nardelli, Marco; Bernholc, Jerry & Roland, Christopher
Description: Article on ad-dimers on strained carbon nano-tubes.
Contributing Partner: UNT College of Arts and Sciences
Onset of Ferrielectricity and the Hidden Nature of Nanoscale Polarization in Ferroelectric Thin Films

Onset of Ferrielectricity and the Hidden Nature of Nanoscale Polarization in Ferroelectric Thin Films

Date: September 5, 2008
Creator: Nuñez, Matías & Buongiorno Nardelli, Marco
Description: Article on the onset of ferrielectricity and the hidden nature of nanoscale polarization in ferroelectric thin films.
Contributing Partner: UNT College of Arts and Sciences
Electronic and Transport Properties of Artificial Gold Chains

Electronic and Transport Properties of Artificial Gold Chains

Date: August 27, 2004
Creator: Calzolari, Arrigo; Cavazzoni, Carlo & Buongiorno Nardelli, Marco
Description: Article on electronic and transport properties of artificial gold chains.
Contributing Partner: UNT College of Arts and Sciences
Brittle and Ductile Behavior in Carbon Nanotubes

Brittle and Ductile Behavior in Carbon Nanotubes

Date: November 23, 1998
Creator: Buongiorno Nardelli, Marco; Yakobson, Boris I. & Bernholc, Jerry
Description: Article discussing research on the response of carbon nanotubes to a tensile load.
Contributing Partner: UNT College of Arts and Sciences
Band Structure and Quantum Conductance of Nanostructures from Maximally Localized Wannier Functions: The Case of Functionalized Carbon Nanotubes

Band Structure and Quantum Conductance of Nanostructures from Maximally Localized Wannier Functions: The Case of Functionalized Carbon Nanotubes

Date: August 12, 2005
Creator: Lee, Young-Su; Buongiorno Nardelli, Marco & Marzari, Nicola
Description: Article on band structure and quantum conductance of nanostructures from maximally localized Wannier functions.
Contributing Partner: UNT College of Arts and Sciences
Dynamic Conductance of Carbon Nanotubes

Dynamic Conductance of Carbon Nanotubes

Date: March 27, 2000
Creator: Roland, Christopher; Buongiorno Nardelli, Marco; Wang, Jian & Guo, Hong
Description: Article on dynamic conductance of carbon nanotubes.
Contributing Partner: UNT College of Arts and Sciences
Dissociation of Water on Defective Carbon Substrates

Dissociation of Water on Defective Carbon Substrates

Date: September 23, 2005
Creator: Kostov, Milen; Santiso, Erik; George, A. M.; Gubbins, Keith E. & Buongiorno Nardelli, Marco
Description: Article on the dissociation of water on defective carbon substrates.
Contributing Partner: UNT College of Arts and Sciences
First-Principles Theory of Correlated Transport through Nanojunctions

First-Principles Theory of Correlated Transport through Nanojunctions

Date: March 25, 2005
Creator: Ferretti, A.; Calzolari, Arrigo; Di Felice, R.; Manghi, F.; Caldas, Marilia J.; Buongiorno Nardelli, Marco et al.
Description: Article on the first-principles theory of correlated transport through nanojunctions.
Contributing Partner: UNT College of Arts and Sciences
Hexagon versus Trimer Formation in In Nanowires on Si(111): Energetics and Quantum Conductance

Hexagon versus Trimer Formation in In Nanowires on Si(111): Energetics and Quantum Conductance

Date: January 12, 2007
Creator: Stekolnikov, A. A.; Seino, Kaori; Bechstedt, Friedhelm; Calzolari, Arrigo & Buongiorno Nardelli, Marco
Description: Article on hexagon versus trimer formation in In nanowires on Si(111).
Contributing Partner: UNT College of Arts and Sciences
Multifunctional Organic-Inorganic Hybrid Nanophotonic Devices

Multifunctional Organic-Inorganic Hybrid Nanophotonic Devices

Date: May 2008
Creator: Garner, Brett William
Description: The emergence of optical applications, such as lasers, fiber optics, and semiconductor based sources and detectors, has created a drive for smaller and more specialized devices. Nanophotonics is an emerging field of study that encompasses the disciplines of physics, engineering, chemistry, biology, applied sciences and biomedical technology. In particular, nanophotonics explores optical processes on a nanoscale. This dissertation presents nanophotonic applications that incorporate various forms of the organic polymer N-isopropylacrylamide (NIPA) with inorganic semiconductors. This includes the material characterization of NIPA, with such techniques as ellipsometry and dynamic light scattering. Two devices were constructed incorporating the NIPA hydrogel with semiconductors. The first device comprises a PNIPAM-CdTe hybrid material. The PNIPAM is a means for the control of distances between CdTe quantum dots encapsulated within the hydrogel. Controlling the distance between the quantum dots allows for the control of resonant energy transfer between neighboring quantum dots. Whereby, providing a means for controlling the temperature dependent red-shifts in photoluminescent peaks and FWHM. Further, enhancement of photoluminescent due to increased scattering in the medium is shown as a function of temperature. The second device incorporates NIPA into a 2D photonic crystal patterned on GaAs. The refractive index change of the NIPA hydrogel as ...
Contributing Partner: UNT Libraries
Substrate-Mediated Intermolecular Hybridization in Binary Phthalocyanine Superstructures

Substrate-Mediated Intermolecular Hybridization in Binary Phthalocyanine Superstructures

Date: 2010
Creator: Calzolari, Arrigo; Jin, Wei; Reutt-Robey, Janice E. & Buongiorno Nardelli, Marco
Description: Article on substrate-mediated intermolecular hybridization in binary phthalocyanine superstructures.
Contributing Partner: UNT College of Arts and Sciences
Structural and electronic properties of carbon nanotube tapers

Structural and electronic properties of carbon nanotube tapers

Date: October 29, 2001
Creator: Meunier, Vincent; Buongiorno Nardelli, Marco; Roland, Christopher & Bernholc, Jerry
Description: Article on structural and electronic properties of carbon nanotube tapers, a set of nanostructures comprised of straight tubular sections with decreasing diameters, joined to each other via conical funnels and terminated with a hemispherical cap.
Contributing Partner: UNT College of Arts and Sciences
Ab initio transport properties of nanostructures from maximally localized Wannier functions

Ab initio transport properties of nanostructures from maximally localized Wannier functions

Date: January 22, 2004
Creator: Calzolari, Arrigo; Marzari, Nicola; Souza, Ivo & Buongiorno Nardelli, Marco
Description: Article on ab initio transport properties of nanostructures from maximally localized Wannier functions.
Contributing Partner: UNT College of Arts and Sciences
First-principles investigations of the dielectric properties of polypropylene/metal-oxide interfaces

First-principles investigations of the dielectric properties of polypropylene/metal-oxide interfaces

Date: October 30, 2009
Creator: Yu, Liping; Ranjan, Vivek; Buongiorno Nardelli, Marco & Bernholc, Jerry
Description: Article on first-principles investigations of the dielectric properties of polypropylene/metal-oxide interfaces. Nanoscale-resolved dielectric properties of polypropylene/metal-oxide (alumina, PbTiO₃) interfaces and of the corresponding surfaces are investigated via first-principles calculations.
Contributing Partner: UNT College of Arts and Sciences
Nucleation of β-FeSi2 nanostructures at pinned step bunches on the Si(111) surface

Nucleation of β-FeSi2 nanostructures at pinned step bunches on the Si(111) surface

Date: May 24, 2005
Creator: Brady, Ryan P.; Sharma, A. S.; Giblet, R. L.; Cottier, Ryan J.; Golding, Terry D. & Pérez, José M.
Description: This article discusses nucleation of β-FeSi2 nanostructures at pinned step bunches on the Si(111) surface.
Contributing Partner: UNT College of Arts and Sciences
UNEP Year Book 2009: New Science in Our Changing Environment

UNEP Year Book 2009: New Science in Our Changing Environment

Date: 2009
Creator: unknown
Description: This publication provides an overview of global and regional environmental issues policy decisions during 2009.
Contributing Partner: UNT Libraries
GEO Year Book 2007: An Overview of Our Changing Environment

GEO Year Book 2007: An Overview of Our Changing Environment

Date: 2007
Creator: United Nations Environment Programme
Description: This publication is an overview of major global environmental issues and policy decisions during the course of 2007.
Contributing Partner: UNT Libraries
Comparison and Evaluation of Existing Analog Circuit Simulator using Sigma-Delta Modulator

Comparison and Evaluation of Existing Analog Circuit Simulator using Sigma-Delta Modulator

Access: Use of this item is restricted to the UNT Community.
Date: December 2006
Creator: Ale, Anil Kumar
Description: In the world of VLSI (very large scale integration) technology, there are many different types of circuit simulators that are used to design and predict the circuit behavior before actual fabrication of the circuit. In this thesis, I compared and evaluated existing circuit simulators by considering standard benchmark circuits. The circuit simulators which I evaluated and explored are Ngspice, Tclspice, Winspice (open source) and Spectre® (commercial). I also tested standard benchmarks using these circuit simulators and compared their outputs. The simulators are evaluated using design metrics in order to quantify their performance and identify efficient circuit simulators. In addition, I designed a sigma-delta modulator and its individual components using the analog behavioral language Verilog-A. Initially, I performed simulations of individual components of the sigma-delta modulator and later of the whole system. Finally, CMOS (complementary metal-oxide semiconductor) transistor-level circuits were designed for the differential amplifier, operational amplifier and comparator of the modulator.
Contributing Partner: UNT Libraries
Nanotechnology: Nanomaterials Are Widely Used in Commerce, but EPA Faces Challenges in Regulating Risk

Nanotechnology: Nanomaterials Are Widely Used in Commerce, but EPA Faces Challenges in Regulating Risk

Date: May 25, 2010
Creator: United States. Government Accountability Office.
Description: A letter report issued by the Government Accountability Office with an abstract that begins "Nanotechnology involves the ability to control matter at the scale of a nanometer--one billionth of a meter. The world market for products that contain nanomaterials is expected to reach $2.6 trillion by 2015. In this context, GAO (1) identified examples of current and potential uses of nanomaterials, (2) determined what is known about the potential human health and environmental risks from nanomaterials, (3) assessed actions EPA has taken to better understand and regulate the risks posed by nanomaterials as well as its authorities to do so, and (4) identified approaches that other selected national authorities and actions U.S. states have taken to address the potential risks associated with nanomaterials. GAO analyzed selected laws and regulations, reviewed information on EPA's Nanoscale Materials Stewardship Program, and consulted with EPA officials and legal experts to obtain their perspectives on EPA's authorities to regulate nanomaterials."
Contributing Partner: UNT Libraries Government Documents Department
Nanotechnology: Accuracy of Data on Federally Funded Environmental, Health, and Safety Research Could Be Improved

Nanotechnology: Accuracy of Data on Federally Funded Environmental, Health, and Safety Research Could Be Improved

Date: April 24, 2008
Creator: United States. Government Accountability Office.
Description: Testimony issued by the Government Accountability Office with an abstract that begins "In March 2008, GAO issued a report entitled Nanotechnology: Better Guidance Is Needed to Ensure Accurate Reporting of Federal Research Focused on Environmental, Health, and Safety Risks (GAO-08-402). In this report, GAO reviewed the National Nanotechnology Initiative (NNI), a multiagency effort administered by the Office of Science and Technology Policy (OSTP). The NNI coordinates the nanotechnology-related activities of 25 federal agencies that fund nanoscale research or have a stake in the results. A key research area funded by some agencies related to studying the potential environmental, health, and safety (EHS) risks that may result from exposure to nanoscale materials. For this testimony statement, GAO was asked to summarize the findings of its March 2008 report, focusing on (1) the extent to which selected agencies conducted EHS research in fiscal year 2006; (2) the reasonableness of the agencies' and the NNI's processes to identify and prioritize EHS research; and (3) the effectiveness of the agencies' and the NNI's process to coordinate EHS research."
Contributing Partner: UNT Libraries Government Documents Department
Nanotechnology: Improved Performance Information Needed for Environmental, Health, and Safety Research

Nanotechnology: Improved Performance Information Needed for Environmental, Health, and Safety Research

Date: May 21, 2012
Creator: United States. Government Accountability Office.
Description: A letter report issued by the Government Accountability Office with an abstract that begins "From fiscal years 2006 to 2010, the National Science and Technology Council (NSTC) reported more than a doubling of National Nanotechnology Initiative (NNI) member agencies’ funding for nanotechnology environmental, health, and safety (EHS) research––from approximately $38 million to $90 million. Reported EHS research funding also rose as a percentage of total nanotechnology funding over the same period, ending at about 5 percent in 2010. However, GAO identified several reporting problems that raise concerns about the quality of EHS funding data reported. For example, for 18 percent of the 2010 projects GAO reviewed that were reported as EHS research, it was not clear that the projects were primarily directed at EHS risks. In addition, NNI member agencies did not always report funding using comparable data. The absence of detailed guidance on how agencies should report funding for their nanotechnology research has contributed to these problems, as GAO also reported in 2008 and made a related recommendation."
Contributing Partner: UNT Libraries Government Documents Department
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