Zobrazeno 1 - 10
of 487
pro vyhledávání: '"Grebel, H."'
Autor:
Grebel, H.
Modern optical systems send and receive ultra-short temporal pulses (USP). While ultra-broad band antennas do exist in the microwave region (e.g., log-periodic antennas, or, concentric loop antennas), their short temporal response is typically limite
Externí odkaz:
http://arxiv.org/abs/2406.18600
Autor:
Grebel, H.
Minimizing both power fluctuations and energy waste in an electrical grid is a central challenge to energy policy. Any discrepancy between power production and loads may lead to inefficiencies and instability in the system. Right now, the electrical
Externí odkaz:
http://arxiv.org/abs/2308.05042
Autor:
Grebel, H., Zhang, Y.
We use surface enhanced Raman spectroscopy (SERS) in studying functionalized Au nanoparticles (AuNPs) when incorporated in active-carbon (A-C) based super-capacitor cells. We observe a resonance-like enhancement in the graphitic line (G-line) vs the
Externí odkaz:
http://arxiv.org/abs/2307.05310
Supercapacitors (S-C) are short-term energy storage elements that find many applications, e.g., electronic charging devices and suppressors of power fluctuations in grids that are interfaced with sustainable sources. The capacitance of an ordinary ca
Externí odkaz:
http://arxiv.org/abs/2203.07496
Autor:
Grebel, H., Zhang, Yuanwei
Publikováno v:
In Chemical Physics 1 March 2024 579
Autor:
Grebel, H.
Supercapacitors, S-C - capacitors that take advantage of the large capacitance at the interface between an electrode and an electrolyte - have found many short-term energy applications. We concentrate here on optically induced, electrical and thermal
Externí odkaz:
http://arxiv.org/abs/2103.15155
Autor:
Grebel, H.
Optical and thermal effects in asymmetric supercapacitors, whose active-carbon (AC) electrodes were embedded with nano-Si (n-Si) quantum dots (QD), are reported. We describe two structures: (1) p-n like, obtained by using a polyethylimine (PEI) binde
Externí odkaz:
http://arxiv.org/abs/2012.08617
Quenching of fluorescence (FL) at the vicinity of conductive surfaces, and in particular, near a 2-D graphene layer has become an important biochemical sensing tool. The quenching is attributed to fast non-radiative energy transfer between a chromoph
Externí odkaz:
http://arxiv.org/abs/2003.00980
Autor:
Walker, J. P., Grebel, H.
In pursuit of infrared (IR) radiation absorbers, we examine quasicrystal structures made of graphite wires. An array of graphitic cages and cage-within-cage, and whose overall dimensions is smaller than the radiation wavelength exhibit a flat absorpt
Externí odkaz:
http://arxiv.org/abs/1907.08656
Autor:
Grebel, H.
A Capacitor-within-Capacitor (CWC) is a nested electronic element that has two components: the cell (e.g., the outer capacitor) and the gate (e.g., the inner capacitor). The designations for the gate and cell may be interchanged. Here, an analysis an
Externí odkaz:
http://arxiv.org/abs/1907.08555