Laser direct writing of nanocompounds

2011 ◽  
Vol 1365 ◽  
Author(s):  
Andreas Ostendorf ◽  
M’Barek Chakif ◽  
Qingchuan Guo
Keyword(s):  
Polymer Materials ◽  
Polymerization Process ◽  
Direct Writing ◽  
Laser Direct Writing ◽  
Bioactive Materials ◽  
New Approach ◽  
Photosensitive Polymer ◽  
The Matrix ◽  
Inorganic Nanomaterials ◽  
Huge Variety

ABSTRACTLaser direct polymerization has been proven as a powerful tool to generate microstructures. Often photosensitive polymer materials are used because they can be tuned by photoactive molecules to be susceptible to a specific wavelength of light to initiate the polymerization process. One of the main drawbacks of this technique is the lack of functional polymers, e.g. conductive, magnetic, mechanical, optical or bioactive materials. Nanocomposites (nanocompounds), i.e. polymers with inorganic nanomaterials incorporated in the matrix offer a huge variety of new functionalities. A new approach will be presented how functional nanocomposite polymers can be generated and used for laser direct writing techniques. This can open the door for completely new MEMS and MOEMS devices comprising active and passive subcomponents.

Dual Regime Spray Deposition Based Laser Direct Writing of Metal Patterns on Polymer Substrates

2020 ◽  
Vol 8 (2) ◽  
Author(s):  
Semih Akin ◽  
Ted Gabor ◽  
Seunghwan Jo ◽  
Hangeun Joe ◽  
Jung-Ting Tsai ◽  
...  
Keyword(s):  
Spray Deposition ◽  
Polymer Surface ◽  
Surface Preparation ◽  
Dip Coating ◽  
Polymer Materials ◽  
Activation Process ◽  
Direct Writing ◽  
Laser Direct Writing ◽  
Polymer Substrates ◽  
Metallization Of Polymers

Abstract In recent years, the metallization of polymers has been intensely studied as it takes advantage of both plastics and metals. Laser direct writing (LDW) is one of the most widely used technologies to obtain metal patterns on polymer substrates. In LDW technology, different methods including injection-molding, drop-casting, dip coating, and spin coating are utilized for surface preparation of polymer materials prior to the laser activation process. In this study, an atomization based dual regime spray coating system is introduced as a novel method to prepare the surface of the materials for LDW of metal patterns. Copper micropatterns on the polymer surface were achieved with a minimum feature size of 30 μm, having a strong adhesion and excellent conductivity. The results show that the dual regime spray deposition system can be potentially used to obtain uniform thin film coating with relatively less material consumption on the substrates for surface preparation of laser direct metallization of polymers.

New approach to laser direct writing active and passive mesoscopic circuit elements

2000 ◽  
Vol 154-155 ◽  
pp. 593-600 ◽  
Author(s):  
D.B Chrisey ◽  
A Pique ◽  
J Fitz-Gerald ◽  
R.C.Y Auyeung ◽  
R.A McGill ◽  
...  
Keyword(s):  
Direct Writing ◽  
Laser Direct Writing ◽  
New Approach ◽  
Circuit Elements

scholarly journals On the Modular Operator of Mutli-component Regions in Chiral CFT

2021 ◽  
Author(s):  
Stefan Hollands
Keyword(s):  
Field Theory ◽  
Integral Equation ◽  
Hilbert Problem ◽  
Matrix Elements ◽  
New Approach ◽  
Conformal Field ◽  
The Matrix ◽  
Kms Condition ◽  
Modular Operator ◽  
Riemann Hilbert Problem

AbstractWe introduce a new approach to find the Tomita–Takesaki modular flow for multi-component regions in general chiral conformal field theory. Our method is based on locality and analyticity of primary fields as well as the so-called Kubo–Martin–Schwinger (KMS) condition. These features can be used to transform the problem to a Riemann–Hilbert problem on a covering of the complex plane cut along the regions, which is equivalent to an integral equation for the matrix elements of the modular Hamiltonian. Examples are considered.

Wavelength tunable fiber Bragg gratings fabricated by stress annealing assisted femtosecond laser direct writing

2021 ◽  
Vol 61 ◽  
pp. 102427
Author(s):  
Xiaoyan Sun ◽  
Zikun Chang ◽  
Li Zeng ◽  
Xinran Dong ◽  
Youwang Hu ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Direct Writing ◽  
Laser Direct Writing ◽  
Wavelength Tunable

Micropatterned Cell‐Repellent Interface Using Femtosecond Laser Direct Writing to Engineer Controlled Cell Organization

2021 ◽  
pp. 2100178
Author(s):  
Wenguang Yang ◽  
Honghui Chu ◽  
Shuxiang Cai ◽  
Wenfeng Liang ◽  
Haibo Yu ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Direct Writing ◽  
Laser Direct Writing ◽  
Cell Organization

scholarly journals Advanced Micro-Actuator/Robot Fabrication Using Ultrafast Laser Direct Writing and Its Remote Control

2020 ◽  
Vol 10 (23) ◽  
pp. 8563
Author(s):  
Sangmo Koo
Keyword(s):  
Three Dimensional ◽  
Processing Technique ◽  
Direct Writing ◽  
Laser Direct Writing ◽  
Precise Control ◽  
Two Photon ◽  
Non Invasive ◽  
Acoustic Control ◽  
Fs Laser ◽  
Invasive Control

Two-photon polymerization (TPP) based on the femtosecond laser (fs laser) direct writing technique in the realization of high-resolution three-dimensional (3D) shapes is spotlighted as a unique and promising processing technique. It is also interesting that TPP can be applied to various applications in not only optics, chemistry, physics, biomedical engineering, and microfluidics but also micro-robotics systems. Effort has been made to design innovative microscale actuators, and research on how to remotely manipulate actuators is also constantly being conducted. Various manipulation methods have been devised including the magnetic, optical, and acoustic control of microscale actuators, demonstrating the great potential for non-contact and non-invasive control. However, research related to the precise control of microscale actuators is still in the early stages, and in-depth research is needed for the efficient control and diversification of a range of applications. In the future, the combination of the fs laser-based fabrication technique for the precise fabrication of microscale actuators/robots and their manipulation can be established as a next-generation processing method by presenting the possibility of applications to various areas.

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