scholarly journals Digital Luminescence Patterning via Inkjet Printing of a Photoacid Catalysed Organic-Inorganic Hybrid Formulation

Polymers ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 430 ◽  
Author(s):  
Jorge Alamán ◽  
María López-Valdeolivas ◽  
Raquel Alicante ◽  
Jose Peña ◽  
Carlos Sánchez-Somolinos
Keyword(s):  
Inkjet Printing ◽  
Functional Materials ◽  
Polymerization Reaction ◽  
Inorganic Hybrid ◽  
Long Term Stability ◽  
Actinic Light ◽  
Hydrolysis And Condensation ◽  
Diverse Application ◽  
Application Fields ◽  
Cationic Ring Opening Polymerization

Accurate positioning of luminescent materials at the microscale is essential for the further development of diverse application fields including optoelectronics, energy, biotechnology and anti-counterfeiting. In this respect, inkjet printing has recently attracted great interest due to its ability to precisely deposit with high throughput and no contact, functional materials on different types of substrates. Here, we present a novel photoacid catalysed organic-inorganic hybrid luminescent ink. The formulation, containing monomers bearing epoxy and silane functionalities, a photoacid generator and a small percentage of Rhodamine-B, shows good jetting properties and adequate wetting of the deposited droplets on the receiving substrates. Ultraviolet exposure of the deposited material triggers the cationic ring-opening polymerization reaction of the epoxy groups. Concomitantly, if atmospheric water is available, hydrolysis and condensation takes place, overall leading to a luminescent crosslinked hybrid organic-inorganic polymeric material obtained through a simple one-step curing process, without post baking steps. Advantageously, protection of the ink from actinic light delays the hydrolysis and condensation conferring long-term stability to the ink. Digital patterning leads to patterned emissive surfaces and elements with good adhesion to different substrates, mechanical and optical properties for the fabrication of optical and photonic elements and devices.

scholarly journals NO2 and NH3 Sensing Characteristics of Inkjet Printing Graphene Gas Sensors

Sensors ◽  
2019 ◽  
Vol 19 (15) ◽  
pp. 3379 ◽  
Author(s):  
Caterina Travan ◽  
Alexander Bergmann
Keyword(s):  
Gas Sensors ◽  
Inkjet Printing ◽  
High Mobility ◽  
High Sensitivity ◽  
Low Noise ◽  
Manufacturing Method ◽  
Long Term Stability ◽  
Wide Range ◽  
Ideal Technique

Graphene is a good candidate for filling the market requirements for cheap, high sensitivity, robust towards contamination, low noise, and low power consumption gas sensors, thanks to its unique properties, i.e., large surface, high mobility, and long-term stability. Inkjet printing is a cheap additive manufacturing method allowing fast, relatively precise and contactless deposition of a wide range of materials; it can be considered therefore the ideal technique for fast deposition of graphene films on thin substrates. In this paper, the sensitivity of graphene-based chemiresistor gas sensors, fabricated through inkjet printing, is investigated using different concentrations of graphene in the inks. Samples have been produced and characterized in terms of response towards humidity, nitrogen dioxide, and ammonia. The presented results highlight the importance of tuning the layer thickness and achieving good film homogeneity in order to maximize the sensitivity of the sensor.

“Ship-in-a-bottle”, a new synthesis strategy for preparing novel hybrid host–guest nanocomposites for highly selective membrane gas separation

2018 ◽  
Vol 6 (4) ◽  
pp. 1751-1771 ◽  
Author(s):  
Abtin Ebadi Amooghin ◽  
Hamidreza Sanaeepur ◽  
Mohammadreza Omidkhah ◽  
Ali Kargari
Keyword(s):  
Gas Separation ◽  
Functional Materials ◽  
Hybrid Nanocomposites ◽  
Membrane Gas Separation ◽  
Polymeric Matrices ◽  
Inorganic Hybrid ◽  
New Synthesis ◽  
Synthesis Strategy ◽  
Selective Membrane

Organic–inorganic hybrid nanocomposites within polymeric matrices have potential as functional materials for membrane gas separation.

Title: Inkjet-printed rectifying metal-insulator-semiconductor (MIS) diodes for flexible electronic applications

2014 ◽  
Vol 1628 ◽  
Author(s):  
Kalyan Yoti Mitra ◽  
Carme Martínez-Domingo ◽  
Enrico Sowade ◽  
Eloi Ramon ◽  
Henrique Leonel Gomes ◽  
...  
Keyword(s):  
Inkjet Printing ◽  
Printed Electronics ◽  
Schottky Diodes ◽  
Functional Materials ◽  
Industrial Applications ◽  
Plastic Substrate ◽  
Organic Thin Film ◽  
Metal Insulator ◽  
Metal Insulator Semiconductor ◽  
Mis Diode

ABSTRACTInkjet printing is a well-accepted deposition technology for functional materials in the area of printed electronics. It allows the precise deposition of patterned functional layers on both, rigid and flexible substrates. Furthermore, inkjet printing is considered as up-scalable technology towards industrial applications. Many electronic devices manufactured with inkjet printing have been reported in the recent years. Some of the evident examples are capacitors, resistors, organic thin film transistors and rectifying Schottky diodes. [1, 2, 3] In this paper we report on the manufacturing of an inkjet-printed metal-insulator-semiconductor (MIS) diode on flexible plastic substrate. The structure is comprised of an insulating and a polymeric semiconducting layer sandwiched between two silver electrodes. The current vs. voltage characteristics are rectifying with rectification ratio up to 100 at |4 V|. Furthermore, they can carry high current densities (up to mA/cm2) and have a low capacitance which makes them attractive for high frequency rectifying circuits. They are also an ideal candidate to replace conventional Schottky diodes for which the fabrication remains a challenge. This is because inkjet printing of Schottky diodes require additional processing steps such as intense pulsed light sintering (IPL sintering) [4] or post-treatments at high temperatures. The deposition of two different metal layers using inkjet printing e.g. Cu or Al with Ag is possible. However, the mentioned post treatment technologies might be incompatible with the already existing layer stack– e.g. it could degrade the organic semiconductor or can damage insulator which in this case is present in the MIS diode architecture.

Synthesis of a novel organic–inorganic hybrid of polyaniline/titanium phosphate for Re(vii) removal

2015 ◽  
Vol 44 (19) ◽  
pp. 8917-8925 ◽  
Author(s):  
Yang Gao ◽  
Changlun Chen ◽  
He Chen ◽  
Rui Zhang ◽  
Xiangke Wang
Keyword(s):  
Hybrid Material ◽  
Oxidative Polymerization ◽  
Titanium Phosphate ◽  
Polymerization Reaction ◽  
Inorganic Hybrid ◽  
Inorganic Hybrid Material

The organic–inorganic hybrid material of polyaniline/titanium(iv) (PANI/Ti(HPO4)2) was synthesized by an oxidative polymerization reaction.

scholarly journals Review—Organic-Inorganic Hybrid Functional Materials: An Integrated Platform for Applied Technologies

2018 ◽  
Vol 165 (8) ◽  
pp. B3137-B3156 ◽  
Author(s):  
Sajjad Husain Mir ◽  
Larry Akio Nagahara ◽  
Thomas Thundat ◽  
Parvaneh Mokarian-Tabari ◽  
Hidemitsu Furukawa ◽  
...  
Keyword(s):  
Functional Materials ◽  
Hybrid Functional ◽  
Inorganic Hybrid ◽  
Integrated Platform

Inkjet Printing as Technology for In-Situ Blending of Thick-Film Resistor Inks

2012 ◽  
Vol 2012 (CICMT) ◽  
pp. 000142-000151
Author(s):  
Marcel Waßmer ◽  
Waldemar Diel ◽  
Klaus Krüger
Keyword(s):  
Thick Film ◽  
Inkjet Printing ◽  
Production Method ◽  
Circuit Boards ◽  
Passive Components ◽  
Long Term Stability ◽  
Efficient Alternative ◽  
Thickness Variations ◽  
New Applications

The integration of passive components directly into circuit boards is an efficient alternative to surface mounted devices. Digital printing methods are more and more emerging technologies for the fabrication of microelectronic circuits. Inkjet printing is a technology for the deposition of a variety of particles with the unique selling proposition of in-situ ink blending. Resistors are one of the most frequently required passive components in electronic circuits. In LTCC technology the integration and additionally the embedding of resistors promises new applications. Integrated resistors are usually screen printed. Inkjet printing has several advantages to compete seriously with screen printing as production method. This study investigates the opportunities of in-situ blending in inkjet printing of thick-film resistors. In a first step, the different options of ink blending are analyzed theoretically. In order to have a basis for further calculations five compositions with a wide resistivity range are printed purely. Afterwards the printed resistors are passed through a post-fire process and the electrical properties are recorded. Reliability and long term stability in drop formation are fundamental for production process. In a second step, the different options of ink blending are analyzed. The five compositions are blended to four combinations of neighbouring inks and are printed and blended with two inkjet printheads. The effect of blending is characterized towards the change in electrical behaviour and the different blending techniques are compared. Additionally, the opportunity of layer thickness variations is investigated and its influence is analyzed. Further, the influences of printing conditions on morphology and resistivity are discussed.

Non-Hydrolyzed Resins for Organic-Inorganic Hybrid Coatings

2017 ◽  
pp. 771-801 ◽  
Author(s):  
Stefan Holberg
Keyword(s):  
Protective Coatings ◽  
Sol Gel ◽  
Hybrid Coatings ◽  
Industrial Scale ◽  
Atmospheric Moisture ◽  
Inorganic Hybrid ◽  
Chemical Structures ◽  
Hydrolysis And Condensation ◽  
Gel Processing ◽  
Area Of Application

This chapter focuses on resins based on non-hydrolyzed, monomeric and polymeric alkoxysilanes. As alternative to classical sol-gel processing, the resins are applied to a surface without a preceding hydrolysis step. Only after application, hydrolysis and condensation of the alkoxysilyl groups occur by means of atmospheric moisture to result cross-linked organic-inorganic hybrid coatings. While the use of non-hydrolyzed silanes is well established, for example by applying polyethyl silicate as binder for zinc-rich anti-corrosive primers, this chapter describes the chemical structures of various novel organic-inorganic hybrid precursors that have significantly extended the area of application to adhesives and scratch-resistant, repellent, or anti-fouling coatings. At present, individual resins are produced and applied at industrial scale in the fields of protective coatings and automotive topcoats.

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