Nanomaterials Processing Laboratory  
Professor
Department of Mechanical and Aerospace Eng.
 
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Welcome to the Nanomaterials Processing Laboratory at the University of California, San Diego


Benefunder

You can contribute to the success of this research! Prof. Graeve has a Benefunder profile that describes opportunities for donations to both research and outreach activities taking place in this laboratory. A recent article on our activities can be found in Planet Experts.


Recent Research Activities

We have been exploring the synthesis of gold-coated magnesium nanoparticles. What an awesome surprise! We found the UCSD "Bear" in our images.

Credits: Synthesis by graduate student Shuang Qiao and image by post-doc Ekaterina Novitskaya.


We have designed and studied the response of amorphous steels to shock wave compression. Experiments have yielded results indicating a Hugoniot Elastic Limit (HEL) close to 12 GPa, which is higher than elastic limits for any metallic glass reported. The materials have received very significant media attention and the press release from UC San Diego is found here.

SAM2X5


Hydroxyapatite

We present a cathodoluminescence study of the spatial distribution of Eu2+ and Eu3+ dopants in hydroxyapatite powders.  The results demonstrate that the distribution of europium ions in the hydroxyapatite lattice depends on their valence state.  Monochromatic cathodoluminescence images from prismatic powders show that while the Eu2+ is distributed homogeneously in the entire powder volume, the Eu3+ is present mainly at the powder edges.  The luminescence spectrum of the Eu2+ ions displayed a wide and strong blue emission centered at 420 nm, while the luminescence spectrum of the Eu3+ ions displayed several orange-red emissions covering the range from 575 to 725 nm.  These emissions correspond to transitions between levels 4f65d1 - 4f7 (8S7/2) of the Eu2+ ions and 5D0 - 7FJ levels of the Eu3+ ions.  Micro Raman measurements reveal that europium doping generates two phonon signals with frequencies of 555 and 660 cm-1, both of which have not been reported earlier.  The powders were synthesized by the combustion synthesis method, maintaining constant the concentration of the europium salt used, and varying the pH of the precursor solutions to modify the concentration ratio of Eu2+ with respect to Eu3+.  X-ray photoelectron spectroscopy measurements were used to determine values of 0.32 and 0.55 for the ratio Eu2+/Eu3+ in samples synthesized at pH values of 6 and 4, respectively.  Thermal treatments of the samples, at 873 K in an oxygen atmosphere, resulted in a strong quenching of the Eu2+ luminescence due to oxidation of the Eu2+ ions into Eu3+, as well as probable elimination of calcium vacancy defects by annealing.

Other contributions on hydroxyapatite:

J.A. Inzana, D. Olvera, S.M. Fuller, J.P. Kelly, O.A. Graeve, E.M. Schwarz, S.L. Kates, and H.A. Awad, "3D Printing of Composite Calcium Phosphate and Collagen Scaffolds for Bone Regeneration," Biomaterials, 35 [13] 4026-4034 (2014).
An editorial on this article can be found at: http://www.atmjournal.org/article/view/6414/7208


TaC Pore Formation

WO3 Powders

TTC Diagram



Hexaboride Synthesis

We have pursued efforts to understand the effects of powder agglomeration and thermal conductivity in copper-based nanofluids. We have proposed a correlation between an experimentally determined particle size distribution from dynamic light scattering and the thermal conductivity enhancement of the nanofluid with respect to nanopowder loading. Synthesis of the copper powders was achieved using polyvinylpyrrolidone, oleic acid, and cetyl trimethylammonium bromide (CTAB). The CTAB-prepared powders exhibited the best dispersion characteristics, forming particles of approximately 80 nm in the presence of SDBS. This study is the first to decouple the effect of a carefully characterized particle size distribution versus crystallite size on the thermal conductivity enhancement of a nanofluid.

Dynamic light scattering of copper nanofluids

Dynamic light scattering of TaC


Molecular dynamics simulation of a reverse micelle

 


 
 
 

 

NEWS

October 2015

At the PCI Gala Banquet representing UCSD together with Michelle Camacho (ACE Fellow).



September 2015

Prof. Graeve was awarded the Distinguished Alumna award by Southwestern College at the "In a Word" banquet on Thursday, September 17.

A Way with Words Banquet

A Way with Words Banquet


September 2015

Prof. Graeve was a featured guest at Bordear el Desierto on Friday, September 4. This is a Mexican national public radio program (on Fusion IMER 102.5 FM) that presents and discusses border issues, as connected to human rights. A full recording of the program can be found here.


May 2015

At the School of Global Policy and Strategy 2015 Launch with Senator Denise Ducheny and Consul Remedios Gomez Arnau.

2015 GPS Launch


May 2015

Prof. Graeve recently participated as keynote speaker in the monthly meeting of Madrugadores de Tijuana. A news article on this event can be found at El Sol de Tijuana.


February 2015

Prof. Graeve was recently honored with the UCSD Universitywide Diversity Award. A video of this award can be found here.

UCSD Diversity Awards 2015


February 2015

Prof. Graeve participated in the

University President's Summit (press release #1)
University President's Summit (press release #2)

which took place at the US Consulate in Tijuana. The purpose of this meeting was to promote cross-border educational collaborations between the cities of the CaliBaja region.

Presidents Summit

Presidents Summit
Credit: Erik Jepsen/UC San Diego Publications


December 2014

Prof. Graeve was featured in Los Observadores, a Spanish-language program of the TV Azteca network that highlights recent achievements in science and engineering.


December 2014

Prof. Graeve was featured in the New York Times, as part of the UCSD "1st in the nation for positive social, civic and research impact, five years in a row" campaign.


November 2014

Prof. Graeve was featured in a Nature news article on diversity in materials science and engineering, as a result of her contributions to the Ethnic Diversity in Materials Science and Engineering report released by the National Science Foundation last September.

She also participated in the Surmounting the Barriers: Ethnic Diversity in Engineering Education workshop organized by the National Academy of Engineering.


October 2014

Prof. Graeve was featured in the women's magazine Mujer Actual, with an article on her scientific accomplishments and efforts to promote science in Tijuana, Mexico.


October 2014

Prof. Graeve was a panelist at Tijuana Innovadora in the "8 Diaspora" panel, together with seven other professors from UC San Diego. A video of this panel can be found here. Chancellor Khosla also participated in a panel focused on enhancing international exchange.

Press releases on this event can be found at:
El Latino
ciudadtijuana

Tijuana Innovadora


July 2014

Prof. Graeve has been named to the Tijuana Walk of Fame and has been featured in This Week @ UC San Diego, Triton Magazine, Frontera, UCnet, and Tijuana Innovadora for her work in promoting careers in science and engineering among Hispanics. The Walk of Fame induction is scheduled for July 31 in Tijuana City Hall, in a ceremony precided by Mr. Jose Galicot and the major of Tijuana.

Tijuana Walk of Fame
Credit: Erik Jepsen/UC San Diego Publications

Additional press releases on the Tijuana Walk of Fame can be found at:
Zeta
Tijuana Digital
En Contacto Magazine
st.media
Infobaja
El Mexicano
MonitorBC.info
Agencia Fronteriza de Noticias
Frontera
bien informado
PSN Primer Sistema de Noticias
Semanario Balun Canan

Tijuana Walk of Fame Event

Tijuana Walk of Fame Event
Credit: Erik Jepsen/UC San Diego Publications


April 2014

Prof. Graeve has been awarded a patent on the synthesis of hexaborides of controlled morphology and their hydrogen storage capacity.

A press release from the Jacobs School of Engineering was recently published together with a variety of news outlets, including The Engineer, e! Science News, design products & applications, Hydrogen Fuel News, the American Ceramic Society Bulletin, and Ceramic Tech Today


March 2014

Ms. Brianna Fernandez, a student in our Tijuana high school summer program during 2013 just received the Kyoto Prize Scholarship. Congratulations to Brianna!

Kyoto Prize Dinner
Olivia Graeve, Brianna Fernandez, and Rommie Amaro at the Kyoto Prize Dinner that took place in San Diego on March 17, 2014.


November 2013

Prof. Graeve has just completed her term as President of the National Institute of Ceramic Engineers (NICE). She handed responsabilities to Dr. Kristen Brosnan, the newly installed President of NICE, during a ceremony at MS&T 2013.

NICE Meeting Fall 2013
Kristen Brosnan and Olivia Graeve at MS&T 2013 during the annual meeting of the National Institute of Ceramic Engineers.


October 2013

Prof. Graeve was a panelist for the "Using Contributions to Diversity in Hiring and Selection" panel at the University of California ADVANCE PAID Roundtable, which took place on Friday, October 25, on the UC San Diego campus. Her presentation can be found here and a final report on this workshop is available here.

Video of Panel at UCTV
Video of panel (available from UC TV).


August 2013

The summer research program for Tijuana, Mexico, high school students came to a very successful end. The five girls from "La Paz" high school were involved in research as diverse as the development of new materials for batteries, characterization of colloidal systems, and molecular dynamics simulations of proteins. All five students presented their research to an audience of approximately 70 guests on the 9th of August.

High School Summer Program 2013


April 2013

Prof. Graeve represented the UCSD Department of Mechanical and Aerospace Engineering in the annual Jacobs School of Engineering Research Expo. The title of her talk was "How to Control the Shape of Matter (and Other Curiosities of Nature)". A video of her presentation can be found here.


August 2012

Prof. Graeve was recently a guest in WXXI's (Rochester, NY) 1370 Connection / AM1370 National Public Radio News & Talk. The topic of discussion was recent advances in materials science.

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