Sintering of Inkjet-printed Cu-nanoparticle Ink in Ambient Conditions Using a Continuous Wave 808 nm Diode Laser

2013 ◽  
Vol 1529 ◽  
Author(s):  
E. Halonen ◽  
S. Koskinen ◽  
I. Leino ◽  
P. Heljo ◽  
M. Mäntysalo
Keyword(s):  
Diode Laser ◽  
Continuous Wave ◽  
Printed Electronics ◽  
Mechanical Performance ◽  
Nitrogen Atmosphere ◽  
Ambient Conditions ◽  
Speed Up ◽  
Rapid Sintering ◽  
Excellent Adhesion ◽  
Nanoparticle Ink

ABSTRACTIn this paper, we focused on sintering of inkjet-printed copper nanoparticle ink structures using a continuous wave 808nm diode laser. Laser sintering in printed electronics is a rapid sintering method which enables localized sintering. Sintering of Cu inks is usually done in nitrogen atmosphere but the novelty of this study is that successful sintering of Cu ink was done under ambient conditions. The used ink consists of copper nanoparticles covered with a dispersion agent. Photonic sintering is needed to speed up the sintering process to prevent oxidation during sintering. Electrical and mechanical performance of the printed structures was analyzed. Resistivity of 10-12 μΩcm with good repeatability as well as excellent adhesion, were achieved.

scholarly journals Medical Applications of Diode Lasers: Pulsed versus Continuous Wave (cw) Regime

Micromachines ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 710
Author(s):  
Michał Michalik ◽  
Jacek Szymańczyk ◽  
Michał Stajnke ◽  
Tomasz Ochrymiuk ◽  
Adam Cenian
Keyword(s):  
Diode Laser ◽  
Continuous Wave ◽  
Diode Lasers ◽  
Short Review ◽  
Medical Application ◽  
Medical Applications ◽  
Therapeutic Effects ◽  
Pulsed Mode ◽  
Medical Therapies

The paper deals with the medical application of diode-lasers. A short review of medical therapies is presented, taking into account the wavelength applied, continuous wave (cw) or pulsed regimes, and their therapeutic effects. Special attention was paid to the laryngological application of a pulsed diode laser with wavelength 810 nm, and dermatologic applications of a 975 nm laser working at cw and pulsed mode. The efficacy of the laser procedures and a comparison of the pulsed and cw regimes is presented and discussed.

Subpicosecond accumulated photon echoes using a continuous-wave multimode diode laser

1989 ◽  
Vol 14 (12) ◽  
pp. 633 ◽  
Author(s):  
Hiroki Nakatsuka ◽  
Ryuzi Yano ◽  
Yoshinori Matsumoto ◽  
Kazuki Inouye
Keyword(s):  
Diode Laser ◽  
Continuous Wave ◽  
Photon Echoes

Continuous-wave operation of long-wavelength quantum-dot diode laser on a GaAs substrate

1999 ◽  
Vol 11 (11) ◽  
pp. 1345-1347 ◽  
Author(s):  
A.E. Zhukov ◽  
A.R. Kovsh ◽  
V.M. Ustinov ◽  
Yu.M. Shernyakov ◽  
S.S. Mikhrin ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Diode Laser ◽  
Gaas Substrate ◽  
Continuous Wave ◽  
Long Wavelength ◽  
Continuous Wave Operation

scholarly journals Inkjet printed electronics using copper nanoparticle ink

2010 ◽  
Vol 21 (11) ◽  
pp. 1213-1220 ◽  
Author(s):  
Jin Sung Kang ◽  
Hak Sung Kim ◽  
Jongeun Ryu ◽  
H. Thomas Hahn ◽  
Seonhee Jang ◽  
...  
Keyword(s):  
Printed Electronics ◽  
Copper Nanoparticle ◽  
Nanoparticle Ink

scholarly journals Reactive Sintering of Cu Nanoparticles at Ambient Conditions for Printed Electronics

ACS Omega ◽  
2020 ◽  
Vol 5 (22) ◽  
pp. 13416-13423 ◽  
Author(s):  
Xiaofeng Dai ◽  
Teng Zhang ◽  
Hongbin Shi ◽  
Yabing Zhang ◽  
Tao Wang
Keyword(s):  
Printed Electronics ◽  
Reactive Sintering ◽  
Cu Nanoparticles ◽  
Ambient Conditions

scholarly journals Arene guest selectivity and pore flexibility in a metal–organic framework with semi-fluorinated channel walls

2017 ◽  
Vol 375 (2084) ◽  
pp. 20160031 ◽  
Author(s):  
Rebecca Smith ◽  
Iñigo J. Vitórica-Yrezábal ◽  
Adrian Hill ◽  
Lee Brammer
Keyword(s):  
Nmr Spectroscopy ◽  
Metal Organic Framework ◽  
Magic Angle Spinning ◽  
Nitrogen Atmosphere ◽  
Magic Angle ◽  
Ambient Conditions ◽  
Solid State Transformation ◽  
X Ray ◽  
Metal Organic ◽  
Organic Framework

A metal–organic framework (MOF) with one-dimensional channels of approximately hexagonal cross-section [Ag 2 (O 2 CCF 2 CF 2 CO 2 )(TMP)] 1 (TMP =2,3,5,6-tetramethylpyrazine) has been synthesized with MeOH filling the channels in its as-synthesized form as [Ag 2 (O 2 CCF 2 CF 2 CO 2 )(TMP)]· n (MeOH) 1-MeOH ( n  = 1.625 by X-ray crystallography). The two types of ligand connect columns of Ag(I) centres in an alternating manner, both around the channels and along their length, leading to an alternating arrangement of hydrocarbon (C–H) and fluorocarbon (C–F) groups lining the channel walls, with the former groups projecting further into the channel than the latter. MeOH solvent in the channels can be exchanged for a variety of arene guests, ranging from xylenes to tetrafluorobenzene, as confirmed by gas chromatography, 1 H nuclear magnetic resonance (NMR) spectroscopy, thermogravimetric analysis and 13 C cross-polarization magic angle spinning NMR spectroscopy. Alkane and perfluoroalkane guests, however, do not enter the channels. Although exhibiting some stability under a nitrogen atmosphere, sufficient to enable crystal structure determination, the evacuated MOF 1 is unstable for periods of more than minutes under ambient conditions or upon heating, whereupon it undergoes an irreversible solid-state transformation to a non-porous polymorph 2 , which comprises Ag 2 (O 2 CCF 2 CF 2 CO 2 ) coordination layers that are pillared by TMP ligands. This transformation has been followed in situ by powder X-ray diffraction and shown to proceed via a crystalline intermediate. This article is part of the themed issue ‘Coordination polymers and metal–organic frameworks: materials by design’.

scholarly journals Minimal Invasive Approach for Lips Venous Lake Treatment by 980 nm Diode Laser with Emphasis on the Aesthetic Results. А Clinical Series

Folia Medica ◽  
2016 ◽  
Vol 58 (2) ◽  
pp. 101-107 ◽  
Author(s):  
Parvan P. Voynov ◽  
Georgi T. Tomov ◽  
Nonka G. Mateva
Keyword(s):  
Adverse Effects ◽  
Diode Laser ◽  
Continuous Wave ◽  
Healing Process ◽  
Basic Knowledge ◽  
Invasive Approach ◽  
Minimal Invasive Approach ◽  
Clinical Series ◽  
Aesthetic Results ◽  
Venous Lake

AbstractIntroduction: A venous lake (VL) is a vascular lesion with common occurrence in many patients, manifested as a dark blue-to-violet compressible papule, caused by dilation of venules. The main reasons for the treatment of VL are aesthetic. The haemorrhaging episodes or impairment of oral normal functions are also under considerations. Treatment of lip VL includes surgical excision, selective photocoagulation, cryotherapy, sclerotherapy and electrodessication. The high-intensity diode laser is an option. The 980 nm diode laser is selectively absorbed by haemoglobin and selectively destroys blood vessels, minimising injury to the surrounding healthy skin.Aim: The purpose of this study was to evaluate the effectiveness of diode laser in the treatment of VL lesions with the accent on the postoperative defects and aesthetic results.Methods: 35 patients aged 37 to 71 were included in this study. A 980 nm diode laser was used in noncontact mode, under local anaesthesia in continuous wave (2-3W, for 20-60s). All patients received only one procedure.Results: Healing process was completed within 2 to 4 weeks after treatment with no scarring. None of the typical adverse effects were observed in the process of healing.Conclusions: Selective photocoagulation is an effective method for treatment of VL. Lower morbidity, minimal patient discomfort and satisfactory functional and aesthetic results are favourable for patients. To optimise the results and to reduce the adverse effects, basic knowledge on lasers and laser-tissue interactions is requisite.

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