scholarly journals In SituChemical Oxidation of UltrasmallMoOxNanoparticles in Suspensions

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Yun-Ju Lee ◽  
Diego Barrera ◽  
Kaiyuan Luo ◽  
Julia W. P. Hsu
Keyword(s):  
Work Function ◽  
Flexible Electronics ◽  
Low Cost ◽  
Chemical Oxidation ◽  
Large Area ◽  
Solution Deposition ◽  
Precise Control ◽  
Organic Optoelectronics ◽  
Continuous Tuning ◽  
Nanoparticle Suspensions

Nanoparticle suspensions represent a promising route toward low cost, large area solution deposition of functional thin films for applications in energy conversion, flexible electronics, and sensors. However, parameters such size, stoichiometry, and electronic properties must be controlled to achieve best results for the target application. In this report, we demonstrate that such control can be achieved viain situchemical oxidation ofMoOxnanoparticles in suspensions. Starting from a microwave-synthesized suspension of ultrasmall (d~2 nm)MoOxnanoparticles in n-butanol, we added H2O2at room temperature to chemically oxidize the nanoparticles. We systematically varied H2O2concentration and reaction time and found that they significantly affected oxidation state and work function ofMoOxnanoparticle films. In particular, we achieved a continuous tuning ofMoOxwork function from 4.4 to 5.0 eV, corresponding to oxidation of as-synthesizedMoOxnanoparticle (20% Mo6+) to essentially pure MoO3. This was achieved without significantly modifying nanoparticle size or stability. Such precise control ofMoOxstoichiometry and work function is critical for the optimization ofMoOxnanoparticles for applications in organic optoelectronics. Moreover, the simplicity of the chemical oxidation procedure should be applicable for the development of other transition oxide nanomaterials with tunable composition and properties.

Low cost and large-area fabrication of self-cleaning coating on polymeric surface based on electroless-plating-like solution deposition approach

RSC Advances ◽  
2015 ◽  
Vol 5 (14) ◽  
pp. 10159-10164 ◽  
Author(s):  
Liangzhuan Wu ◽  
Yuan Yu ◽  
Jinfang Zhi
Keyword(s):  
Electroless Plating ◽  
Low Cost ◽  
Large Area ◽  
Solution Deposition ◽  
Polymeric Surface ◽  
Self Cleaning

Self-cleaning coating on polymeric surface based on electroless-plating-like solution deposition approach.

Inkjet-Printing of Methylammonium Lead Trihalide Perovskite as Active Layers for Optoelectronic Devices

MRS Advances ◽  
2018 ◽  
Vol 3 (32) ◽  
pp. 1837-1842 ◽  
Author(s):  
Charles Trudeau ◽  
Martin Bolduc ◽  
Patrick Beaupré ◽  
Jaime Benavides-Guerrero ◽  
Bruno Tremblay ◽  
...  
Keyword(s):  
Flexible Electronics ◽  
Inkjet Printing ◽  
Printed Electronics ◽  
Low Cost ◽  
Hole Transport ◽  
Ambient Atmosphere ◽  
Large Area ◽  
Device Architecture ◽  
Active Layers ◽  
Metal Organic

ABSTRACTNew routes in additive devices fabrication techniques and advances in printable materials are required to meet the ever increasing demands for low-cost and large-area flexible electronics. In particular, perovskite-based materials have gained an appeal due to their unique optoelectronics and ferroelectrics properties, which may replace p-n junction in semiconductor devices. Metal-organic methylammonium lead trihalide perovskite formulations have been extensively studied in the last few years as promising materials for use in printed electronics, which do not require high temperatures or vacuum environment, contrary to conventional semiconductor fabrication techniques. In this work, digital inkjet-printing in ambient atmosphere is proposed as a deposition pathway for the fabrication of perovskite active layers in photodetector and thin-film photovoltaic device architectures. The device architecture containing a printed perovskite active layer sandwiched between TiO2 and Spiro-OMeTAD as electron and hole transport layers, respectively, as well as layer-on-layer fabrication and responsivity spectra of the perovskite-based device are presented.

Facile graphene transfer directly to target substrates with a reusable metal catalyst

Nanoscale ◽  
2015 ◽  
Vol 7 (36) ◽  
pp. 14807-14812 ◽  
Author(s):  
D. L. Mafra ◽  
T. Ming ◽  
J. Kong
Keyword(s):  
Flexible Electronics ◽  
Chemical Etching ◽  
Low Cost ◽  
Metal Catalyst ◽  
Scale Production ◽  
Large Area ◽  
High Quality ◽  
Roll To Roll ◽  
Graphene Transfer ◽  
Industrial Scale Production

We explore a CVD transfer technique that abandons both the intermediate membrane and chemical etching of the metal catalyst. This method is fast, simple and is a necessary route towards roll-to-roll production of large-area CVD graphene sheets at high quality and low cost. Such integration is a step forward to the economical and industrial scale production of graphene and enables technology for flexible electronics and optoelectronics.

Mapping Growth of an Emerging Technology: A Case Study of Flexible Electronics

2009 ◽  
Author(s):  
Srikanth Poranki ◽  
Nagen Nagarur ◽  
Krishnaswami Srihari
Keyword(s):  
Flexible Electronics ◽  
Low Cost ◽  
Growth Curves ◽  
High Technology ◽  
Emerging Technology ◽  
Life Cycles ◽  
Growth Potential ◽  
Life Cycle Approach ◽  
Large Area ◽  
Technology Growth

Technological innovation is viewed as one of the main economic multipliers. In high-technology sectors, with intense competition and short product life cycles, failure to detect an emerging technology could be devastating to both incumbent technology pursuers and innovators. Firms typically employ methods such as a Delphi method, Technology growth curves or technology road-mapping methods to identify and forecast growth. Some of these methods are based on a life cycle approach where a technology is expected to follow an S-curve and then become obsolete in due time, which is analogous to market diffusion of products. In the case of emerging technologies, forecasting methods are not always reliable due to lack of historical data. Hence, both qualitative and quantitative methods are employed to forecast; however, there are risks associated with both of these methods. A general consensus in technology forecasting community is to apply multiple methods for forecasting. In the last few decades there has been explosion of new technologies, especially in the high-technology sector of electronics. Several new applications such as Large Area Displays (several square feet in area), low cost electronics (e.g. RFID tags being manufactured for pennies or cents per unit) and body conformable electronic applications are a few of a long and growing list. The aforementioned applications could broadly be categorized to form a new and emerging field of electronics called flexible electronics. These applications utilize the rugged lightweight plastics to potentially offer attractive characteristics such as low-cost processing, mechanical flexibility, large area coverage, etc. these characteristics are not easily implemented with established silicon technologies. This research analyzes flexible electronics technology by first identifying a few key innovations. Patent and publications data are collected and technology growth curves based on the indicators would be generated, and compared with those of incumbent technology innovations, to assess technology growth potential. Based on the study, technology adoption strategies would also be recommended by which business leaders could anticipate and plan for the effects of these innovations.

Computer simulation study about the dependence of amorphous silicon photonic waveguides efficiency on the material quality

2020 ◽  
Vol 90 (3) ◽  
pp. 30502
Author(s):  
Alessandro Fantoni ◽  
João Costa ◽  
Paulo Lourenço ◽  
Manuela Vieira
Keyword(s):  
Amorphous Silicon ◽  
High Throughput Screening ◽  
Simulation Analysis ◽  
Low Cost ◽  
Deposition Process ◽  
Large Area ◽  
Sidewall Roughness ◽  
Sensing Applications ◽  
Fabrication Defects ◽  
The Impact

Amorphous silicon PECVD photonic integrated devices are promising candidates for low cost sensing applications. This manuscript reports a simulation analysis about the impact on the overall efficiency caused by the lithography imperfections in the deposition process. The tolerance to the fabrication defects of a photonic sensor based on surface plasmonic resonance is analysed. The simulations are performed with FDTD and BPM algorithms. The device is a plasmonic interferometer composed by an a-Si:H waveguide covered by a thin gold layer. The sensing analysis is performed by equally splitting the input light into two arms, allowing the sensor to be calibrated by its reference arm. Two different 1 × 2 power splitter configurations are presented: a directional coupler and a multimode interference splitter. The waveguide sidewall roughness is considered as the major negative effect caused by deposition imperfections. The simulation results show that plasmonic effects can be excited in the interferometric waveguide structure, allowing a sensing device with enough sensitivity to support the functioning of a bio sensor for high throughput screening. In addition, the good tolerance to the waveguide wall roughness, points out the PECVD deposition technique as reliable method for the overall sensor system to be produced in a low-cost system. The large area deposition of photonics structures, allowed by the PECVD method, can be explored to design a multiplexed system for analysis of multiple biomarkers to further increase the tolerance to fabrication defects.

Fabrication of 3D Temperature Sensor Using Magnetostrictive Inkjet Printhead

2020 ◽  
Vol 64 (5) ◽  
pp. 50405-1-50405-5
Author(s):  
Young-Woo Park ◽  
Myounggyu Noh
Keyword(s):  
Flexible Electronics ◽  
Inkjet Printing ◽  
Temperature Sensor ◽  
Computer Aided Design ◽  
Low Cost ◽  
Three Dimensional ◽  
Drop On Demand ◽  
Aided Design ◽  
Nanoparticle Ink ◽  
Inkjet Printhead

Abstract Recently, the three-dimensional (3D) printing technique has attracted much attention for creating objects of arbitrary shape and manufacturing. For the first time, in this work, we present the fabrication of an inkjet printed low-cost 3D temperature sensor on a 3D-shaped thermoplastic substrate suitable for packaging, flexible electronics, and other printed applications. The design, fabrication, and testing of a 3D printed temperature sensor are presented. The sensor pattern is designed using a computer-aided design program and fabricated by drop-on-demand inkjet printing using a magnetostrictive inkjet printhead at room temperature. The sensor pattern is printed using commercially available conductive silver nanoparticle ink. A moving speed of 90 mm/min is chosen to print the sensor pattern. The inkjet printed temperature sensor is demonstrated, and it is characterized by good electrical properties, exhibiting good sensitivity and linearity. The results indicate that 3D inkjet printing technology may have great potential for applications in sensor fabrication.

A novel low cost texturization method for large area commercial mono-crystalline silicon solar cells

2006 ◽  
Vol 90 (20) ◽  
pp. 3557-3567 ◽  
Author(s):  
U. Gangopadhyay ◽  
K.H. Kim ◽  
S.K. Dhungel ◽  
U. Manna ◽  
P.K. Basu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Crystalline Silicon ◽  
Low Cost ◽  
Silicon Solar Cells ◽  
Large Area ◽  
Crystalline Silicon Solar Cells

scholarly journals Magnetic iron oxide/clay nanocomposites for adsorption and catalytic oxidation in water treatment applications

2020 ◽  
Vol 18 (1) ◽  
pp. 1148-1166
Author(s):  
Ganjar Fadillah ◽  
Septian Perwira Yudha ◽  
Suresh Sagadevan ◽  
Is Fatimah ◽  
Oki Muraza
Keyword(s):  
Iron Oxide ◽  
Water Treatment ◽  
Photocatalytic Oxidation ◽  
Low Cost ◽  
Synthesis Method ◽  
Chemical Oxidation ◽  
Magnetic Iron Oxide ◽  
Oxidation Processes ◽  
Recent Developments ◽  
Physical And Chemical

AbstractPhysical and chemical methods have been developed for water and wastewater treatments. Adsorption is an attractive method due to its simplicity and low cost, and it has been widely employed in industrial treatment. In advanced schemes, chemical oxidation and photocatalytic oxidation have been recognized as effective methods for wastewater-containing organic compounds. The use of magnetic iron oxide in these methods has received much attention. Magnetic iron oxide nanocomposite adsorbents have been recognized as favorable materials due to their stability, high adsorption capacities, and recoverability, compared to conventional sorbents. Magnetic iron oxide nanocomposites have also been reported to be effective in photocatalytic and chemical oxidation processes. The current review has presented recent developments in techniques using magnetic iron oxide nanocomposites for water treatment applications. The review highlights the synthesis method and compares modifications for adsorbent, photocatalytic oxidation, and chemical oxidation processes. Future prospects for the use of nanocomposites have been presented.

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