scholarly journals Optimizing Aerosol Jet Printing Process of Platinum Ink for High-Resolution Conductive Microstructures on Ceramic and Polymer Substrates

Polymers ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 918
Author(s):  
Pavel V. Arsenov ◽  
Alexey A. Efimov ◽  
Victor V. Ivanov
Keyword(s):  
High Resolution ◽  
Ethylene Glycol ◽  
Platinum Nanoparticles ◽  
Pt Nanoparticles ◽  
Polymer Substrates ◽  
Aggregation Stability ◽  
Different Types ◽  
Jet Printing ◽  
Aerosol Jet Printing ◽  
Discharge Method

Printing nano-ink with platinum nanoparticles to generate conductive microstructures for electronics on different types of substrates has gained increasing interest in recent years. To solve the problem of the low conductivity of platinum (Pt) nano-ink, we synthesized chemically pure Pt nanoparticles with sizes of 18.2 ± 9.0 nm by spark discharge method. A low toxic solvent, ethylene glycol with water, was used to ensure the aggregation stability of Pt nanoparticles. Polyvinylpyrrolidone was used as an adhesive additive and binder in the nano-ink. Narrow and conductive Pt lines were generated by aerosol jet printing technology. The resistivity of the Pt lines sintered at 750 °C on alumina substrate was found to exceed the bulk Pt by about 13%. Moreover, the Pt film fabricated on polymer substrates has demonstrated excellent mechanical flexibility in terms of twisting tests.

scholarly journals Electrocatalytic reduction of oxygen at platinum nanoparticles dispersed on electrochemically reduced graphene oxide/PEDOT:PSS composites

RSC Advances ◽  
2020 ◽  
Vol 10 (51) ◽  
pp. 30519-30528
Author(s):  
Teklewold Getachew ◽  
Fitsum Addis ◽  
Solomon Mehretie ◽  
Hin-Lap Yip ◽  
Ruidong Xia ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Ethylene Glycol ◽  
Reduced Graphene Oxide ◽  
Platinum Nanoparticles ◽  
Pt Nanoparticles ◽  
Electrocatalytic Reduction ◽  
Reduced Graphene ◽  
Electrochemically Reduced Graphene Oxide ◽  
Solvent Additive

Composites of commercially available graphene oxide and poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) with solvent additive ethylene glycol were investigated as an alternative support for Pt nanoparticles towards the electrocatalytic reduction of oxygen.

Direct Aerosol Printing of Lithium-ion Batteries

2017 ◽  
Vol 2017 (1) ◽  
pp. 000391-000397 ◽  
Author(s):  
Xiaowei Yu ◽  
I-Meng Chen ◽  
Susmita Sarkar ◽  
Jonghyun Park ◽  
Heng Pan ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Li Ion Battery ◽  
Active Materials ◽  
Polymer Substrates ◽  
Aerosol Printing ◽  
Jet Printing ◽  
Li Ion ◽  
Aerosol Jet Printing ◽  
First Time

Abstract Recently, additive manufacturing (AM) has brought new opportunities to the manufacturing of lithium-ion batteries (LIBs). In this study, aerosol jet printing, as a branch of AM technologies was demonstrated to fabricate lithium-ion batteries for the first time. Printable inks of two pairs of active materials for cathode and anode were developed. The effect of ink composition on the printing characteristics was studied. The developed inks were printed into Li-ion battery electrodes with specific capacities comparable to conventional slurry cast electrodes. Next, to demonstrate fully-printed electrodes, gold and copper inks were printed on top of polymer substrates and thermal/flash sintered as the current collectors for cathode and anode.

Optimization of Aerosol Jet Printing for High-Resolution, High-Aspect Ratio Silver Lines

2013 ◽  
Vol 5 (11) ◽  
pp. 4856-4864 ◽  
Author(s):  
Ankit Mahajan ◽  
C. Daniel Frisbie ◽  
Lorraine F. Francis
Keyword(s):  
High Resolution ◽  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Jet Printing ◽  
Aerosol Jet Printing

Backscattered Electron Imaging of GaAs/AlGaAs Super Lattice Structures with an Ultra-High- Resolution SEM

1988 ◽  
Vol 46 ◽  
pp. 204-205
Author(s):  
Kazumichi Ogura ◽  
Michael M. Kersker
Keyword(s):  
High Resolution ◽  
Layer Structure ◽  
High Sensitivity ◽  
Beam Current ◽  
Electron Beam Current ◽  
Lattice Structures ◽  
Super Lattice ◽  
Different Types ◽  
Backscattered Electron ◽  
Electron Imaging

Backscattered electron (BE) images of GaAs/AlGaAs super lattice structures were observed with an ultra high resolution (UHR) SEM JSM-890 with an ultra high sensitivity BE detector. Three different types of super lattice structures of GaAs/AlGaAs were examined. Each GaAs/AlGaAs wafer was cleaved by a razor after it was heated for approximately 1 minute and its crosssectional plane was observed.First, a multi-layer structure of GaAs (100nm)/AlGaAs (lOOnm) where A1 content was successively changed from 0.4 to 0.03 was observed. Figures 1 (a) and (b) are BE images taken at an accelerating voltage of 15kV with an electron beam current of 20pA. Figure 1 (c) is a sketch of this multi-layer structure corresponding to the BE images. The various layers are clearly observed. The differences in A1 content between A1 0.35 Ga 0.65 As, A1 0.4 Ga 0.6 As, and A1 0.31 Ga 0.69 As were clearly observed in the contrast of the BE image.

A knowledge transfer framework to support rapid process modeling in aerosol jet printing

2021 ◽  
Vol 48 ◽  
pp. 101264
Author(s):  
Haining Zhang ◽  
Joon Phil Choi ◽  
Seung Ki Moon ◽  
Teck Hui Ngo
Keyword(s):  
Knowledge Transfer ◽  
Process Modeling ◽  
Rapid Process ◽  
Jet Printing ◽  
Aerosol Jet Printing

scholarly journals Multiple objects tracking in the UAV system based on hierarchical deep high-resolution network

2021 ◽  
Author(s):  
Wei Huang ◽  
Xiaoshu Zhou ◽  
Mingchao Dong ◽  
Huaiyu Xu
Keyword(s):  
High Resolution ◽  
Object Tracking ◽  
High Performance ◽  
State Of The Art ◽  
Class Imbalance ◽  
Unified Framework ◽  
Multiple Objects ◽  
Tracking Process ◽  
Objects Tracking ◽  
Different Types

AbstractRobust and high-performance visual multi-object tracking is a big challenge in computer vision, especially in a drone scenario. In this paper, an online Multi-Object Tracking (MOT) approach in the UAV system is proposed to handle small target detections and class imbalance challenges, which integrates the merits of deep high-resolution representation network and data association method in a unified framework. Specifically, while applying tracking-by-detection architecture to our tracking framework, a Hierarchical Deep High-resolution network (HDHNet) is proposed, which encourages the model to handle different types and scales of targets, and extract more effective and comprehensive features during online learning. After that, the extracted features are fed into different prediction networks for interesting targets recognition. Besides, an adjustable fusion loss function is proposed by combining focal loss and GIoU loss to solve the problems of class imbalance and hard samples. During the tracking process, these detection results are applied to an improved DeepSORT MOT algorithm in each frame, which is available to make full use of the target appearance features to match one by one on a practical basis. The experimental results on the VisDrone2019 MOT benchmark show that the proposed UAV MOT system achieves the highest accuracy and the best robustness compared with state-of-the-art methods.

scholarly journals Clinical practice guidelines for high-resolution breast PET, 2019 edition

2021 ◽  
Vol 35 (3) ◽  
pp. 406-414
Author(s):  
Yoko Satoh ◽  
Masami Kawamoto ◽  
Kazunori Kubota ◽  
Koji Murakami ◽  
Makoto Hosono ◽  
...  
Keyword(s):  
High Resolution ◽  
Practice Guidelines ◽  
Breast Imaging ◽  
Japanese Society ◽  
Insurance Coverage ◽  
Whole Body ◽  
Positron Emission Mammography ◽  
Dedicated Breast Pet ◽  
Positron Emission ◽  
Different Types

AbstractBreast positron emission tomography (PET) has had insurance coverage when performed with conventional whole-body PET in Japan since 2013. Together with whole-body PET, accurate examination of breast cancer and diagnosis of metastatic disease are possible, and are expected to contribute significantly to its treatment planning. To facilitate a safer, smoother, and more appropriate examination, the Japanese Society of Nuclear Medicine published the first edition of practice guidelines for high-resolution breast PET in 2013. Subsequently, new types of breast PET have been developed and their clinical usefulness clarified. Therefore, the guidelines for breast PET were revised in 2019. This article updates readers as to what is new in the second edition. This edition supports two different types of breast PET depending on the placement of the detector: the opposite-type (positron emission mammography; PEM) and the ring-shaped type (dedicated breast PET; dbPET), providing an overview of these scanners and appropriate imaging methods, their clinical applications, and future prospects. The name “dedicated breast PET” from the first edition is widely used to refer to ring-shaped type breast PET. In this edition, “breast PET” has been defined as a term that refers to both opposite- and ring-shaped devices. Up-to-date breast PET practice guidelines would help provide useful information for evidence-based breast imaging.

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