New sol–gel synthetic route to transition and main-group metal oxide aerogels using inorganic salt precursors

Gash, Alexander E.; Tillotson, Thomas M.; Satcher, Joe H.; Hrubesh, Lawrence W.; Simpson, Robert B.

doi:10.1016/s0022-3093(01)00427-6

Cited by 349 publications

(185 citation statements)

References 16 publications

(23 reference statements)

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“…On the other hand, the aquocomplex of metal ions with formal charge less than þ3 owns lower acidity compared with !þ3 metal ions. This lower acidity can slow down the protonation of the added epoxide and the subsequent rise in the pH, which allows alternative side reactions to occur to a significant degree and cause precipitation to take place [29]. This was further proven by the formation of greenish precipitate of iron(II) hydroxide in this study using iron(II) chloride tetrahydrate as starting materials.…”

Section: Resultsmentioning

confidence: 61%

Structure control synthesis of iron oxide polymorph nanoparticles through an epoxide precipitation route

Cui

Ren

Peng

et al. 2012

Journal of Experimental Nanoscience

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Iron oxide polymorph nanoparticles (magnetite, goethite and lepidocrocite) were synthesised through a novel epoxide precipitation route. Epoxide, as a precipitating agent, induced the precipitation of iron(II) ions in the form of hydroxide through its reaction with aquocomplexes of Fe 2þ ions. The organic intermediate, which was produced from the ring-opening reaction of epoxide, functionalised the surface of the formed precipitate in situ, resulting in the minimisation of the nanoparticles' aggregation. Another advantage of this route is its simple procedure for the preparation of iron oxide nanoparticles with different structures and their well-defined morphology. Magnetite, goethite and lepidocrocite nanoparticles were obtained just by the pH regulation and air oxidation at room temperature.

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Section: Resultsmentioning

confidence: 61%

Structure control synthesis of iron oxide polymorph nanoparticles through an epoxide precipitation route

Cui

Ren

Peng

et al. 2012

Journal of Experimental Nanoscience

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“…Our generalized strategy for producing metal oxide sols for thin film deposition utilizes a proton scavenger (propylene oxide) to control the degree of condensation in the solution, thus resulting in improved control over material nanostructure. This procedure, based on previously published routes to metal oxide xero-and aerogel materials (for example, [39]), is applicable to a wide range of materials and results in high-quality coatings on a variety of substrates.…”

Section: Experimental Methodsmentioning

confidence: 99%

Development of an efficient large-aperture high damage-threshold sol-gel diffraction grating.

Ashley¹,

Rambo²,

Schwarz³

et al. 2005

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In order to develop the next generation of high peak intensity lasers, new grating technology providing higher damage thresholds and large apertures is required. The current assumption is that this technical innovation will be multilayer dielectric gratings, wherein the uppermost layer of a thin film mirror is etched to create the desired binary phase grating. A variant of this is explored with the upper grating layer being a lower density gelatin-based volume phase grating in either sol-gel or dichromated gelatin. One key benefit is the elimination of the etching step.3

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“…[11][12][13] For the past fifteen years researchers at LLNL have developed a new economical, safe, and straightforward sol-gel synthetic routes to highly pure, high surface area, small particle size, inorganic oxides (oxidizers) and organic (fuel) sol-gel materials. [14][15][16] Using the sol-gel methodology structural and compositional parameters can be manipulated on the nanoscale. This has enabled the establishment of new energetic materials with new and potentially useful properties.…”

Section: Scheme 1 Scheme Showing the Structural Features Of An Energmentioning

confidence: 99%

Magnetic Resonance Imaging of Polymeric Drug Delivery Systems in Breast Cancer Solid Tumors

Zarabi¹

2007

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Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. REPORT DATE (DD-MM-YYYY) 11-07-2006 REPORT TYPE Final Technical Project Report DATES COVERED (From -To)June 2003 SPONSOR/MONITOR'S REPORT NUMBER(S)PP-1362 DISTRIBUTION / AVAILABILITY STATEMENT Unlimited Distribution SUPPLEMENTARY NOTES none ABSTRACTThis work details the stab ignition, small-scale sensitivity, and energy release characteristics of bimetallic Al/Ni(V) and Al/Monel energetic nanolaminate free-standing films. The influence of the engineered nanostructural features of the multilayersiscorrelated with both stab initiation and small-scale energetic materials testing results. Structural parameters of the thin films found to be important include the bi-layer period, total thickness of the film, and presence of coating Al layers. Live lead-free M55 stab detonators were prepared using energetic nanolaminate as the stab mix, cyanuric triazide as the transfer charge, and an Army formulation for the output charge. These lead-free detonators were demonstrated to have the acceptable stab sensitivity (21-35 mJ) as is required in current M55 detonators. There was evidence that the replacement of the current NOL-130 stab mix by compact powders of energetic multilayers does not affect the performance of the stab detonator. SUBJECT TERMS

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New sol–gel synthetic route to transition and main-group metal oxide aerogels using inorganic salt precursors

Abstract: This is a preprint of a paper intended for publication in a journal or proceedings. Since changes may be made before publication, this preprint is made available with the understanding that it will not be cited or reproduced without the permission of the author.

Cited by 349 publications

References 16 publications

Structure control synthesis of iron oxide polymorph nanoparticles through an epoxide precipitation route

Structure control synthesis of iron oxide polymorph nanoparticles through an epoxide precipitation route

Development of an efficient large-aperture high damage-threshold sol-gel diffraction grating.

Magnetic Resonance Imaging of Polymeric Drug Delivery Systems in Breast Cancer Solid Tumors

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