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This work reports a thin-film supercapacitor featuring advanced electrode and electrolyte materials and the capability of integration on SiO2/Si substrate. Conventional supercapacitors see their limit including low effective surface area electrode, low voltage-tolerance electrolyte, and bulky size. This work addresses these issues by the following novelties: 1) spray-coated rGO electrode layer with...
Electrical spin injection into semiconductors is fundamental to realize spintronic devices using the electron spin degree of freedom instead of or in addition to the charge. Datta-Das spin eld-eect transistor is a classical scheme which comprises ferromagnetic spin injector and detector while injected spins in the channel are manipulated by electric field.1 InAs nanowire is a suitable candidate as...
Organic and polymer-based resistive memory cell sandwiched between two vertically aligned electrodes constitute crossbar memory arrays in which the building blocks, referred to as bit cells, possess two or multiple stable resistance states.1 They are promising circuit elements due to their good scalability and processability, high possibility of molecular design through chemical synthesis, high storage...
Ferromagnetic electrodes with perpendicular magnetic anisotropy (PMA) have been extensively studied because of the outstanding performance in applications. [1] To obtain high tunneling magnetoresistance (TMR), researchers have put efforts to realize PMA with Co-based full-Heusler alloy films with MgO barrier. However, the lattice mismatch between MgO and full-Heusler alloy leads to a rapid TMR reduction...
Electric-Field-Control of magnetism using BiFeO3-based heterostructures is attracting a great amount of research interest. BiFeO3 (BFO) has outstanding ferroelectric properties and G-type antiferromagnetic ordering in the bulk. BFO has also a relatively high ferroelectric Curie temperature (TC∼1100K), high antiferromagnetic Neel temperature (TN∼640K), high remnant polarization (2Pr∼110μC/cm2), and...
Al/Ta2O5/Pt RRAM cell was successfully demonstrated with stable bipolar switching. Band alignment for the structure of Al/Ta2O5/Pt was obtained using high-resolution X-ray photoelectron spectroscopy to investigate resistance switching behavior. Hole barrier heights of Ta2O5 on metals Pt and Al were extracted using core level and valence band spectra. The energy band alignments of Pt/TaOx and Al/TaO...
Densely packed carbon nanotube (CNT) forest on silicon wafer has been fabricated by combining the process of mechanical press and liquid densification. Advantages from the densely packed CNT forest prototype devices include: (1) 16-fold volume reduction with the same amount of CNT forest as compared to the as-grown CNT forest; (2) preservations of aligned CNT organization and natural contacts to the...
This work is based on developing an amorphous silicon-coated, vertically aligned carbon nanotube (CNT) forest for energy storage applications. The architecture of the electrode has three valuable features: (1) enhanced charge transfer via aligned CNTs to the substrate, (2) excellent charge storage capability via amorphous silicon, and (3) the preservation of high surface area and porosity with enhanced...
Acute myocardial infarction is one of the leading causes of morbidity and mortality all over the world. Therefore, it is of very high importance to detect myocardial infarction effectively and accurately in its early phase with an efficient method. Electrocardiogram provides a non-invasive and inexpensive way for diagnosis of myocardial infarction through seeking for the ischemic syndromes in ECG,...
To suppress charge injection at electrodes, direct fluorination using fluorine gas was used in linear low density polyethylene. High fluorination degree was obtained as indicated by attenuated total reflection infrared spectroscopy. Remarkable suppression of charge injection due to the surface fluorination was found by the space charge distribution measurements using the laser-induced pressure pulse...
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