This paper presents the optimization of double-gate silicon (Si) tunnel field-effect transistors (TFETs). It shows that, for heterodielectric structure, I <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">ON</sub> current is boosted by correctly positioning source with respect to gate edge. The second booster used in this Si thickness that tuned order maximize current. effects lead performance increase are explained on a physical basis. We also...

Boiling has served as an effective means to dissipate large quantities of heat over small areas. Graphene, a two-dimensional material, garnered significant attention researchers due its excellent thermal properties. In this study, copper test chips are dip coated with solution consisting graphene oxide and pool boiling performance distilled water at atmospheric pressure was investigated. The surfaces were characterized using X-ray diffraction, Fourier transform infrared spectroscopy,...

Enhanced pool boiling heat transfer, with simultaneous increase in critical flux (CHF) and transfer coefficient (HTC), is desired to improve overall system efficiency reduce equipment size cost. This paper focuses on combining graphene oxide (GO) porous copper particles generate microstructures based their ability enhance HTC, CHF, or both. Three performance characteristics CHF improvements wall superheat reductions are identified: Type I—reduction only, type II—increase III—increase...

Abstract Nickel coatings have demonstrated significant benefits in protecting copper from oxidation and fouling, thereby enhancing the longevity of copper-based components. This study employed an electroplating apparatus featuring a Watts bath electrode to investigate impact flowing electrolyte, both with without applied magnetic field, on interfacial characteristics nickel-coated surfaces. The findings reveal relationship between current density deposition thickness. application...

We present a near-field scanning optical microscopy (NSOM) study of S interdiffusion in polycrystalline CdS/CdTe heterojunctions. diffusion from CdS into CdTe leads to the formation CdTe1−xSx ternary phase. Because band gap varies with composition, we were able combine NSOM tunable laser source microscopically identify S-rich regions layer. composition was found be very nonuniform and frequently greater along grain boundaries than centers, identifying as locations enhanced interdiffusion.

Rapid advances in nanotechnology recent years have raised concern about the occurrence, distribution, fate, and transport of nanoparticles environment. Sources environment include their widespread use a variety engineering operations, biomedical applications, consumer goods, food drug delivery system, so forth. Because they can be released into either as waste product or byproduct some engineered processes nanoscale materials are increasingly detected various environmental matrices. By very...

Abstract We demonstrate a novel technique to achieve highly surface active, functional, and tunable hierarchical porous coated surfaces with high wickability using combination of ball milling, salt-templating, sintering techniques. Specifically, ball-milling obtain graphene nanoplatelets (GNP) draped copper particles followed by salt templated induce the strength cohesiveness particles. The salt-templating method was specifically used promote porosity on coatings. A systematic study...

Abstract Polycrystalline II–VI semiconductor materials show great promise for thin‐film photovoltaic cells and modules. Large‐area deposition of these semiconductors such as CdTe is possible by a variety methods but the use plasma‐based method magnetron sputtering can have significant advantages. Here we present recent results in fabrication CdS/CdTe using rf discuss some advantages that appear from this class materials. Some are particularly relevant polycrystalline PV community addresses...

The application of graphene for pool boiling is an attractive option to facilitate compaction and promote efficient heat removal from high power density devices. In this context, chemical characterization the depositions achieved through commonly employed coating techniques are important topic discussion. A detailed structure-property relationship between morphologies obtained on mono multilayered coatings their corresponding performance quantified by experimental critical fluxes presented....

Herein, the efficacy of graphene nanoplatelets–copper (GNP–Cu) composite coatings formed by ball milling and sintering methods in enhancing pool boiling, i.e., phase‐change heat transfer tested for distilled water, is presented. The boiling performance quantified an increase critical flux (CHF) coefficient (HTC) at lower wall superheat temperature. facilitates draping highly thermally conductive GNP around individual copper particles subsequent results morphological features that further...

Wettability and wickability of a surface are the key properties that govern variety industrial applications. Understanding effect aging on durability these surfaces subsequent changes occurring in their molecular structure is vital to maintain functionality. In this work, we used repetitive pool boiling test graphene oxide-copper (GO-Cu) coated studied chemistry morphology. We observed transformation GO-Cu reduced GO-copper (rGO-Cu) coating led improved performance. This improvement...

Multilayer films of rhodamine 6G can act as its own dielectric layer on gold surfaces to enhance emission spectra.

Apoptosis or necrosis of neurons in the central nervous system (CNS) is thehallmark many neurodegenerative diseases and Traumatic Brain Injury (TBI). Theinability to regenerate CNS offers little hope for naturally repairing damagedneurons. However, with rapid development new technologies, regenerative medicineoffers great promises patients these disorders. Among events furtheradvancement medicine, extracellular matrix (ECM) plays a critical role forcellular migration differentiation. To...

Graphene is a two-dimensional material that possesses excellent thermal properties and thus has gained an enormous attention in the applications of heat transfer. In this work, we demonstrate enhancement boiling transfer performance on substrate coated with graphene oxide and/or copper composites. The composites were introduced by two commonly used coating techniques-dip-coating two-step electrochemical deposition method. focus paper to compare morphologies, surface such as wickability...

This work, article number 1901562 by Anju R Gupta and co-workers, investigates the boiling performance of ball milled graphene nanoplatelets (GNP) copper coated particles that results in draping GNPs over particles. It was discovered GNP-draped coatings possessed hierarchical porosity served as nucleation sites for increased bubble activity. These can be applied many thermal engineering applications.

We report the development of nitrogen-doped ZnTe back contacts for CdS/CdTe solar cells. Reproducible p-type doping was achieved by reactive RF magnetron sputtering with Ar/N/sub 2/ gas mixtures. The conductivity doped films about five orders magnitude higher than that intrinsic sputtered films. These were used as glass/SnO/sub 2//CdS/CdTe contact structure ZnTe/ZnTe:N/Ni showed slightly lower initial performance but improved stability compared to our evaporated Cu/Au a 3000 hr test cycle at...

Passive pool boiling enhancements offer attractive cooling possibilities to address the demand for effective thermal management in high powered electronic systems. Enhancements have been achieved through area augmentation, providing additional nucleation sites or by inducing liquid wettability changes. Graphene, a two-dimensional material, has garnered significant attention of researchers due its excellent properties. In this study, heat transfer surfaces are dip coated with an...