Nanotechnology for Energy, Environment, Electronics, Healthcare and Industry: Session I
Program Organizers: Navin Manjooran, Solve Technology and Research, Inc.; Gary Pickrell, Virginia Tech
Monday 2:00 PM
September 30, 2019
Location: Oregon Convention Center
Session Chair: Navin Manjooran, Solve; Gary Pickrell, Virginia Tech
2:00 PM Keynote
Nanoengineered Materials for Energy and BioMedical Systems (NEMS): Sudipta Seal1; 1University of Central Florida
Nanotechnology has enabled things that is not possible otherwise. In the nano domain materials exhibit unique physical, chemical and biological properties. In this talk, we will present various case studies. Nanotechnology could possibly hold key to the new era of energy storage materials. When used in electrochemical energy storage devices, nanomaterials pose unique advantages such as shorter diffusion distances, increased contact with the electrolyte, better accommodation of strains, etc. In this regard, we recently studied the morphology dependent charge storage in nano CeO2. Herein, we discuss the crystal plane and morphological effects on the supercapacitance of three different CeO2 nanostructures. Our results are in in good agreement with molecular dynamics simulations. In the second example, we present the unique surface properties of specially designed nanoceria resulted in various biomedical applications. Redox state of nanoceria is unique to exhibit its enzyme mimetic behavior and was able to combat various cell dysfunction caused by oxidative stress.
2:40 PM Invited
c-VACNT, New Nano-to-Macro Material Platform with a Rich Application Potential: Karlheinz Strobl1; Sandra Gainey1; 1CVD Equipment Corporation
c-VACNT™ are free standing structures of Vertically Aligned Carbon Nano Tubes (VACNT) infiltrated with carbon. The manufacturing process steps include photolithographic patterning of catalyst wafers, VACNT growth, carbon infiltration, separation from the growth substrate and optional secondary coating and/or other local or global surface modifications. These nano-carbon based macroscopic structures (typically 0.2-5mm tall) have a bi-continuous phase structure with 20-100 nm wide slit pores that are mechanically stable despite being semi-flexible so that they can survive drying after acetone or water soaking. They can be designed to have through channels, notches, branches, arms, fractal features etc. ranging from 5 Ám to mm and to >100 mm size. We will present application examples of how these c-VACNT™ structures can be used to significantly improve the performance and functionality of medical and industrial devices, including artificial lungs, and other devices that operate either with fluids and/or provide mechanical functions.
3:00 PM Cancelled
Agglomeration of Ultra-fine Particles in Media by Acoustic Wave: Hyo-Soo Lee1; Hai-Joong Lee1; Hyung-Won Shin1; 1Korea Institute of Industrial Technology
The ultra-fine particles in media such as air and water have been recently caused in the view of environmental pollution. The ultra-fine dusts in air and the fine plastics in water have been challenged to solve with the conventional technology such as filtering, electrostatic etc. We investigated the novel technology for agglomerating the ultra-fine particles induced by acoustic wave with the frequency ranging from 20Hz to 20kHz and the sound pressure level from 0 to 100dB. When the low frequency and the SPL under 50Hz and 100dB were applied in the constraint box containing ultra-fine particles, the rate of agglomeration of ultra-fine particles was nearly 5 times higher than that without operating. And it was observed that the size of agglomerated particles was grown to large particles within a few minute, which can be applied to increase the efficiency of the conventional particle collection technology such as the commercial filter.
Challenges & Solutions: New Nano-materials For Renewable Energy Applications: Shabana Parvin Shaikh1; 1SP Pune University
One of the most popular and innovative sources of renewable energy for the future is the hydrogen economy based SOFC research. However, the materials choice for SOFC fabrication is still a major and challenging task in the field of SOFCs. Thus there is need to search alternative new electrodeand lectrolyte nano materials which can be synthesize easily with cheaper synthesis technique and in less time by saving energy to minimize the actual cost of fabrication of SOFC from its commercialization point of view. In the present and most past author tried for the solution of the challenges of SOFC by investigating new materials and synthesis technique compared to conventional one such as MS-GNP technique with enhanced expected results for SOFC applications.
3:40 PM Break
Characterization of Nanophase Carbon Infused Copper Alloys and Thin Films: Beihai Ma1; Uthamalingam Balachandran1; Stephen Dorris1; Tae Lee1; Jie Wang1; Jianguo Wen1; Jonathan Poplawsky2; Adam Rondinone2; 1Argonne National Laboratory; 2Oak Ridge National Laboratory
We prepared nanophase carbon infused copper alloys by electron-beam melting. This new class of materials, known as covetics, exhibit enhanced electrical and thermal conductivities. Up to ≈30% enhancement in electrical conductivity was observed in covetic copper thin films deposited by electron-beam evaporation. Our results revealed remarkable promise for use in energy saving applications. Understanding the nature of interaction between the carbon nanostructures and their host metal is critical to elucidate the origins for superior properties. We utilized helium ion microscopy (HIM), high-resolution transmission electron microscopy (HRTEM) and scanning transmission electron microscopy (STEM) in the study of carbon nanostructures in copper covetics and thin films. HIM provided unique opportunity to visualize carbon nanostructures in metal matrix due to its superior contrast and resolution; HRTEM and STEM elemental mapping verified the existence of carbon nanoparticles, clusters, and networks in the host copper. Details of experimental results will be presented in this talk.
Dialysate Regeneration by Efficient Urea Decomposition with TiO2 Nanowire Photoelectrochemical Cell: Guozheng Shao1; Yushi Zang1; Bruce Hinds1; 1University of Washington, Seattle
Over 2 million End Stage Renal Disease patients receive dialysis to sustain life. Conventional hemodialysis removes urea and other metabolic wastes by running ~120 L of dialysate in each session, which is typically 3-4 hours and 3 times a week. The intermittent character of hemodialysis results in large fluctuations in blood metabolite concentrations. A photoelectrochemical cell with TiO2/FTO anode, 10 mM urea/0.15 M NaCl electrolyte, and 4 mg/cm2 Pt black loaded carbon paper cathode was characterized for urea decomposition efficiency. Under 4 mW/cm2 illumination using 365 nm LED with 40% quantum efficiency, the device yielded a photocurrent density of ~ 1 mA/cm2, corresponding to 40% quantum efficiency in urea decomposition per incident photon. A device with ~0.23 m2 area and a current draw of 11 A is able to decompose a daily 15 g urea production sufficient to regenerate dialysate, thus making a portable dialysis device feasible.
Direct Contact Membrane Distillation (DCMD) using a Composite PVDF Electrospun Nanofiber Membrane for Water Desalination Application: Mahmoud Baniasadi1; Momena Monwar1; Nicholas Sutton1; 1Georgia Southern University
Every year more than three million people die from the water-related disease. Having access to good quality drinking water is a continuous challenge in our world. Among various water desalination membrane technologies, Membrane Distillation (MD) is an emerging thermally-driven, membrane-based desalination technology highly suitable to treat hypersaline solutions. MD is a thermally driven process involving a nano/microporous, hydrophobic membrane through which only water vapor can diffuse.In the present study, modified PVDF electrospun nanofiber membrane composites with various support structures were studied for DCMD application. Hydrophobicity of the nanofiber membranes was investigated and different filler and parameter setting of the electrospinning process have been optimized in order to optimize the performance of the nanofiber membrane in the water desalination process. Surface modification of the nanofibers has been investigated using atomic force microscopy (AFM), in order to correlate the nanostructure of nanofibers, with the performance of the nanofiber membrane in DCMD.
5:00 PM Concluding Comments