Enhanced field emission from ZnO nanowires grown on carbon cloth (see Figure) has been measured. These emitters produced a current density of 1 mA cm–2 at about 0.7 V μm–1, corresponding to an exceptionally high field-enhancement factor 4.11 × 104. Such extremely is believed be the combined effect aspect ratio and geometry carbon-cloth substrate.

It had been demonstrated that large-scale honeycomb-like nanoparticle arrays could be fabricated inexpensively by the process of monolayer nanosphere self-assembly. Here we report a double-layer masking procedure can effectively used to overcome restriction honeycomb order in an array resulted from mask. By varying relative angle between two layers, different arrangement nanoparticles obtained. The directly controlled with aid diffraction patterns illuminating layers laser beam. Experimental...

Next-generation printed electronics is required to be of high performance, cost-effective, multifunctional, sustainable, and environmentally benign. Herein, we report the manufacturing a flexible carbon-coated paper for ensuring abovementioned requirements. The multifunctional substrate achieved by employing copy paper, cellulose nanofibers (CNFs), lignin-derived graphitic carbon as base substrate, binder, conductive pigment, respectively, using scalable simple Mayer rod coating calendering...

The blueshift of the optical absorption edge along with intense red photoluminescence (PL) peak has been observed from micron-long crystalline silicon nanowires prepared by pulsed-laser vaporization heated Si (mixed metal catalyst) targets. Previous studies on confinement in nanostructures resulted a dispute regarding application theoretical models to explain their properties. Based microstructure phenomenological model, incorporating nanowire diameter distribution is used, which found...

A hybrid photodetector fabricated with a halide perovskite and silicon nanowire (SiNW) heterojunction for broadband detection ranging from near‐ultraviolet to near‐infrared is reported. The device fabrication conducted by directly coating chemically etched vertical SiNW arrays thin films nanofibers produced liquid precursors. optimized film/SiNW heterojunction‐based under 532 nm illumination exhibits excellent spectral responsivity of 13 W −1 , high specific detectivity reaching 10 Jones at...

In the last decade, freestanding, single crystal silicon nanowires (SiNWs) have attracted significant attention as a potential material for low‐cost optoelectronic devices. this paper, we demonstrate how strong localized surface plasmon modes, induced using silver nanoparticles, can be used to achieve improvement in simple hybrid organic–inorganic photovoltaic device between n‐type and poly(3,4‐ethylenedioxythiophene):poly‐(styrenesulfonate) (PEDOT:PSS). At photon energies above resonance,...

The nanoscale engineering of silicon can significantly change its bulk optoelectronic properties to make it more favorable for device integration. Phonon process is one way enhance inter-band transitions in silicon's indirect band structure alignment. This paper demonstrates phonon localization at the tip nanowires fabricated by galvanic displacement using wet electroless chemical etching a wafer. High-resolution Raman micro-spectroscopy reveals that such arrayed structures display...

Abstract In the last decades, significant research has been done on nanocrystalline forms of titanium dioxide (TiO 2 ). Amorphous TiO not studied intensively despite being significantly less expensive compared to crystalline . This study reveals improvement in UV-VIS photodetection properties from heterostructures fabricated ambient environment using n-type silicon nanowire arrays and amorphous sol-gel. Our ultra-low-cost photodetectors can cover a wide range applications. We report fast...

Abstract The development of an electrically-conductive anticorrosion coating with self-healing capability for metallic surface protection constitutes a priority concern many key industrial applications. While current technologies largely rely on hazardous chromate-based corrosion inhibitors, this work proposes simple polymer-based layer-by-layer (LBL) architecture, implemented using easy and fast fabrication techniques. Moreover, smart architecture relies three environmentally friendly...

Abstract In this study, a feasible approach for UV–vis photodetection using hybrid heterojunction by integrating porous silicon and TiO 2 thin film is demonstrated. The photodetector demonstrates excellent photoresponse three orders of magnitude enhancement fast rise/decay time constants 0.16/0.14 ms. Under small bias (1 V), the exhibits very high responsivity up to 40 A W −1 at 532 nm irradiation over broadband wavelength range from 300–700 nm. heterostructure geometry yields...

In the last decades, titania (or TiO2) particles played a crucial role in development of photo-catalysis and better environmentally-friendly energy-harvesting techniques. this work, we engineer new generation TiO2 rich oxygen vacancies using modified sol-gel synthesis. By design, these vacancy-rich efficiently absorb visible light to allow carefully-controlled light-induced conversion anatase or rutile crystalline phases. FTIR micro-Raman spectroscopy reveal formation during explain unique...

We report significantly improved silicon nanowire/TiO2 n+-n heterojunction solar cells prepared by sol-gel synthesis of TiO2 thin film atop vertically aligned nanowire arrays obtained facile metal-assisted wet electroless chemical etching a bulk highly doped n-type wafer. As we show here, treatment the prior to depositing precursor has dramatic consequences on device performance. While hydrofluoric remove native oxide already improves performances, hydrobromic (HBr) consistently yields far...

Chromate conversion coatings have been in service for decades providing robust corrosion protection to a wide variety of aluminum alloys. However, it is also known that anti-corrosive containing Cr 6+ contributes DNA damage, cause cancer and are not environmentally friendly. Consequently, regulatory restrictions over the use were established mitigate environmental damage health problems. To answer this hurdle meet emergent need friendly coatings, we successfully developed an innovative...

Due to its high refractive index, reflectance is often a problem when using Germanium for optoelectronic devices integration. In this work, we propose an effective and low-cost nano-texturing method considerably reducing the of bulk Germanium. To do so, uniform V-shape pit arrays are produced by wet electroless chemical etching in 3:1 volume ratio highly-concentrated hydrochloridric nitric acids or so-called aqua regia bath immersion times ranging from 5 60 min. The resulting morphology,...

In this study, we have fabricated and characterized three different configurations of photodetectors with digital inkjet printing techniques on types silicon substrates, such as pristine n-type chemically nanostructured silicon, without Ag nanoparticle-induced surface-plasmon enhancement. Among these comparison batches, digitally printed devices enhancement yield the highest photocurrent factor 920×, lowest rise decay times τr = 176 ms τd 98 ms, respectively, responsivity 24.8 mA W−1 at...

Abstract Surface plasmon are widely used to promote the exciton generation and light absorption in solar cells photodetectors. In this work, a feasible approach for UV–vis-NIR photodetection using plasmon-enhanced silicon nanowires (SiNWs) amorphous TiO 2 heterostructure is presented. The photodetector shows excellent photo response up 3.3 orders of magnitude enhancement with rise/decay times 77/51 μ s. Under small external bias (1V), exhibits very high responsivity 49 A W −1 over broadband...

This paper proposes a new paradigm in polymer light-emitting diode (PLED) fabrication by using uniform electrosprayed microparticle film as the active layer. Among seven electrospraying parameters analyzed, three crucial are statistically identified and optimized to obtain thin layers. Using conditions, single-color red-emitting PLED (MEH-PPV) with peak current density of 16.1 mA/mm2 under 13.5 V bias external quantum efficiency 3.2% successfully fabricated. Finally, combinatorial approach...

Abstract Surface plasmon based techniques are widely used to promote the exciton generation and light absorption in solar cells photodetectors. In this work, a feasible approach for UV-VIS-NIR photodetection using induced silicon nanowires (SiNWs) amorphous TiO 2 heterostructure is presented. The photodetector shows excellent photoresponse up 3.5 orders of magnitude enhancement with rise/decay time constants 0.75/0.5 µs. Under small bias (1V), exhibits very high responsivity 49 A/W at 532 nm...