University of California, Los Angeles

Bulk-Size Transparent Gadolinium Oxide-Polymer Nanocomposites for Gamma Ray Scintillation

Chen Q., Cai W., Hajagos T., Kishpaugh D., Liu C., Cherepy N., Dooraghi A., Chatziioannou A., Payne S., Pei Q., University of California, Los Angeles, US

Heavy element loaded polymer composites have long been proposed to detect high energy X- and -rays upon scintillation. The previously reported bulk composite scintillators have achieved limited success because of the diminished light output resulting [...]

Stretchable Electronics

Liang J., Li L., Liang J., Hajagos J., Niu X., Yu Z., Pei Q., University of California, Los Angeles, US

The emergence of devices that combine elasticity with electronic or optoelectronic properties offers exciting new opportunities for applications, but brings significant materials challenges. We will report (1) an elastomeric transparent conductor as a radically new [...]

Bulk-Size Transparent Gadolinium Oxide-Polymer Nanocomposites for Gamma Ray Scintillation

Chen Q., Cai W., Hajagos T., Kishpaugh D., Liu C., Cherepy N., Dooraghi A., Chatziioannou A., Payne S., Pei Q., University of California, Los Angeles, US

Heavy element loaded polymer composites have long been proposed to detect high energy X- and -rays upon scintillation. The previously reported bulk composite scintillators have achieved limited success because of the diminished light output resulting [...]

Multimedia Environmental Distribution of Nanomaterials

Liu H.H., Cohen Y., University of California, Los Angeles, US

In the present study, a generalized model of the multimedia environmental distribution of engineered nanomaterial is developed via multimedia fate and transport modeling to estimate potential exposure levels in various environmental compartments. In this model, [...]

Analysis of Membrane Filtration Efficiency in Removal of Metal Oxide Nanoparticles from Aqueous Nanoparticle Suspension in the Presence of Coagulation Pretreatment

Surawanvijit S., Kim M., Cohen Y., University of California, Los Angeles, US

The introduction of nanoparticles (NPs) into aqueous environment is expected to rise with increased manufacturing and use of nanoparticles. There is a need to identify efficient and methods for NP removal and such methods must [...]

Analysis of Membrane Filtration Efficiency in Removal of Metal Oxide Nanoparticles from Aqueous Nanoparticle Suspension in the Presence of Coagulation Pretreatment

Surawanvijit S., Kim M., Cohen Y., University of California, Los Angeles, US

The introduction of nanoparticles (NPs) into aqueous environment is expected to rise with increased manufacturing and use of nanoparticles. There is a need to identify efficient and methods for NP removal and such methods must [...]

Modeling Aggregation and Size Distribution of Nanoparticles with Monte Carlo Simulation

Liu H., Surawanvijit S., Rallo R., Orkoulas G., Cohen Y., University of California, Los Angeles, US

The size distribution of the nanoparticles and their aggregates is crucial for predictions of the fate and transport of nanoparticles in the environment. A computational model was developed in the present work based on a [...]

Toward reliable synthesis of radiotracers for positron emission tomography in PDMS microfluidic chips: Study and optimization of the [18F] fluoride drying process

Tseng W-Y, University of California, Los Angeles, US

Positron Emission Tomography (PET) is a powerful imaging tool with high sensitivity and molecular specificity. Microfluidic systems have shown great promise for the preparation of PET tracers labeled with fluorine-18 (F-18), especially those based on [...]

Formation of Giant Unilamellar Vesicles from Block Copolymers and Study of AqpZ and KvAP Protein Incorporation with Light Microscopy

Patti J.T., Brooks E.K., Montemagno C.D., University of California, Los Angeles, US

We have formed giant unilamellar vesicles (GUV’s) using two types of block copolymers—PMOXZ-PDMS-PMOXZ triblock and PBD-PEO diblock—and studied incorporation of labeled, transmembrane proteins using aquaporin (AqpZ), a water channel protein, and KvAP, a voltage-gated potassium [...]

Demonstration of Pulsed Silicon Raman Laser

Boyraz O., Jalali B., University of California, Los Angeles, US

Recently, Raman effect in silicon has been pursued for light generation and amplification by utilizing high Raman gain coefficient of silicon. However, free carrier generation due to two photon absorption limited the achieving high Raman [...]