A5030994463- Thermal properties of materials
- Graphene research and applications
- Thermal Radiation and Cooling Technologies
- Nanowire Synthesis and Applications
- Carbon Nanotubes in Composites
- Silicon Nanostructures and Photoluminescence
- RNA modifications and cancer
- Cancer Genomics and Diagnostics
- Gene expression and cancer classification
- Lung Cancer Treatments and Mutations
- Additive Manufacturing and 3D Printing Technologies
- Advancements in Semiconductor Devices and Circuit Design
- Silicon Carbide Semiconductor Technologies
- Chalcogenide Semiconductor Thin Films
- Ferroelectric and Piezoelectric Materials
- Quantum Dots Synthesis And Properties
- Pancreatic and Hepatic Oncology Research
- Copper-based nanomaterials and applications
- Diamond and Carbon-based Materials Research
- Anodic Oxide Films and Nanostructures
University of California, Riverside
2014-2018
University of Tehran
2011
Thermal conductivity of free‐standing reduced graphene oxide films subjected to a high‐temperature treatment up 1000 °C is investigated. It found that the annealing dramatically increases in‐plane thermal conductivity, K , from ≈3 ≈61 W m −1 at room temperature. The cross‐plane ⊥ reveals an interesting opposite trend decreasing very small value ≈0.09 in annealed °C. obtained demonstrate exceptionally strong anisotropy K/K ≈ 675, which substantially larger even than high‐quality graphite....
We have investigated thermal conductivity of graphene laminate films deposited on polyethylene terephthalate substrates. Two types were studied, as and compressed, in order to determine the physical parameters affecting heat conduction most. The measurements performed using optothermal Raman technique a set suspended samples with thickness from 9 44 μm. was found be range 40 90 W/mK at room temperature. It unexpectedly that average size alignment flakes are more important defining than mass...
We investigate the thermal conductivity of suspended graphene as a function density defects, ND, introduced in controllable way. High-quality layers are synthesized using chemical vapor deposition, transferred onto transmission electron microscopy grid, and over ∼7.5 μm size square holes. Defects induced by irradiation with low-energy beam (20 keV) quantified Raman D-to-G peak intensity ratio. As defect changes from 2.0 × 1010 cm−2 to 1.8 1011 decreases ∼(1.8 ± 0.2) 103 W mK−1 ∼(4.0 102 near...
We describe Raman spectroscopy‐based method of measuring thermal conductivity thin films and review significant results achieved with this technique pertinent to graphene other two‐dimensional materials. The optothermal was instrumental for the discovery unique heat conduction properties graphene. In method, spectroscopy is used determine local temperature sample, while excitation laser utilized as a source. success in investigating suspended graphene‐based motivated extension material...
Abstract Blood-based approaches to detect early-stage cancer provide an opportunity improve survival rates for lung cancer, the most lethal world-wide. Multiple blood-based detection using molecular analytes derived from individual ‘omics (cell-free DNA, RNA transcripts, proteins, metabolites) have been developed and tested, generally showing significantly lower sensitivity versus late-stage cancer. We hypothesized that approach multiple types of analytes, including broad untargeted coverage...
We report results of a combined investigation thermal conductivity and acoustic phonon spectra in nanoporous alumina membranes with the pore diameter decreasing from D=180 nm to 25 nm. The samples hexagonally arranged pores were selected have same porosity ~13%. Brillouin-Mandelstam spectroscopy measurements revealed bulk-like spectrum D=180-nm spectral features, which attributed spatial confinement, 25-nm 40-nm pores. velocity longitudinal phonons was reduced smaller Analysis experimental...
We have performed a rigorous investigation of the structure and composition individual grains in copper–zinc–tin–sulfide (CZTS) films realized by sulfurization sputtered metal stack. Although on average close to ideal CZTS stoichiometry, elemental analysis shows significant grain-to-grain variations composition. High-resolution Raman spectroscopy indicates that this is accompanied structural as well. The intensity from 337 cm–1 peak, generally assigned kesterite phase CZTS, remains constant...
We investigated thermal conductivity of free-standing reduced graphene oxide films subjected to a high-temperature treatment up 1000 C. It was found that the annealing dramatically increased in-plane conductivity, K, from 3 W/mK 61 at room temperature. The cross-plane Kc, revealed an interesting opposite trend decreasing very small value 0.09 in annealed obtained demonstrated exceptionally strong anisotropy K/Kc ~ 675, which is substantially larger even than high-quality graphite. electrical...
Abstract Pancreatic ductal adenocarcinoma (PDAC) is currently the 3rd leading cause of cancer-related deaths in US. Although all-stage 5-year survival rate ~10%, early-stage markedly superior and excess 40%. Hence, early detection PDAC via blood-based liquid biopsies holds promise to reduce morbidity mortality. PrognomiQ’s multi-omics platform performs deep unbiased molecular profiling blood samples detect proteins, metabolites, lipids, mRNA, miRNA, cfDNA fragmentation copy-number, CpG...
We report on the use of silicon nano-grass and nano-textured structures for field emission applications. A triode device, which can be used as a transistor with gate, emitter (cathode) collector (anode), has been realized. Anode in this structure is substrate placed opposite to grass tips acting emitter. The nano formation based hydrogen assisted reactive ion etching process where mixture O2/H2 SF6 gases are sequential manner. results electrical measurements investigation show sharp rise current.
We have investigated thermal conductivity of graphene laminate films deposited on polyethylene terephthalate substrates. Two types were studied - as and compressed in order to determine the physical parameters affecting heat conduction most. The measurements performed using optothermal Raman technique a set suspended samples with thickness from 9 44 micrometers. was found be range 40 W/mK 90 at room temperature. It unexpectedly that average size alignment flakes are more important defining...
Abstract Lung cancer is the leading cause of cancer-related deaths in United States, with estimates 236,740 new cases and 118,830 2022 secondary to disease. Blood-based liquid biopsies hold promise reduce morbidity mortality from lung by enabling early detection downstage disease at diagnosis, theragnostic identification patients most likely be helped or harmed therapy, monitoring therapeutic efficacy, residual PrognomiQ’s multi-omics platform comprehensively profiles proteins, metabolites,...
Abstract not Available.