Micropatterning of poly(p -phenylene vinylene) by femtosecond laser induced forward transfer

2018 ◽  
Vol 68 (1) ◽  
pp. 160-163 ◽  
Author(s):  
Juliana MP Almeida ◽  
Oriana I Avila ◽  
Marcelo B Andrade ◽  
Josiani C Stefanelo ◽  
Adriano JG Otuka ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Phenylene Vinylene ◽  
Forward Transfer

scholarly journals Micron-scale copper wires printed using femtosecond laser-induced forward transfer with automated donor replenishment

2013 ◽  
Vol 3 (6) ◽  
pp. 747 ◽  
Author(s):  
James A. Grant-Jacob ◽  
Benjamin Mills ◽  
Matthias Feinaeugle ◽  
Collin L. Sones ◽  
Gerrit Oosterhuis ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Forward Transfer

Optimization study of the femtosecond laser-induced forward-transfer process with thin aluminum films

2007 ◽  
Vol 46 (21) ◽  
pp. 4650 ◽  
Author(s):  
Sudipta Bera ◽  
A. J. Sabbah ◽  
J. M. Yarbrough ◽  
C. G. Allen ◽  
Beau Winters ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Transfer Process ◽  
Aluminum Films ◽  
Optimization Study ◽  
Thin Aluminum ◽  
Forward Transfer

scholarly journals Hybrid superhydrophilic–superhydrophobic micro/nanostructures fabricated by femtosecond laser-induced forward transfer for sub-femtomolar Raman detection

2019 ◽  
Vol 5 (1) ◽  
Author(s):  
Xiaodan Ma ◽  
Lan Jiang ◽  
Xiaowei Li ◽  
Bohong Li ◽  
Ji Huang ◽  
...  
Keyword(s):  
Detection Limit ◽  
Femtosecond Laser ◽  
Contact Area ◽  
Fluid Transport ◽  
Sers Substrate ◽  
Simple Method ◽  
Small Areas ◽  
Forward Transfer ◽  
Surface Enhanced Raman ◽  
Target Molecules

Abstract Raman spectroscopy plays a crucial role in biochemical analysis. Recently, superhydrophobic surface-enhanced Raman scattering (SERS) substrates have enhanced detection limits by concentrating target molecules into small areas. However, due to the wet transition phenomenon, further reduction of the droplet contact area is prevented, and the detection limit is restricted. This paper proposes a simple method involving femtosecond laser-induced forward transfer for preparing a hybrid superhydrophilic–superhydrophobic SERS (HS-SERS) substrate by introducing a superhydrophilic pattern to promote the target molecules to concentrate on it for ultratrace detection. Furthermore, the HS-SERS substrate is heated to promote a smaller concentrated area. The water vapor film formed by the contact of the solution with the substrate overcomes droplet collapse, and the target molecules are completely concentrated into the superhydrophilic region without loss during evaporation. Finally, the concentrated region is successfully reduced, and the detection limit is enhanced. The HS-SERS substrate achieved a final contact area of 0.013 mm2, a 12.1-fold decrease from the unheated case. The reduction of the contact area led to a detection limit concentration as low as 10−16 M for a Rhodamine 6G solution. In addition, the HS-SERS substrate accurately controlled the size of the concentrated areas through the superhydrophilic pattern, which can be attributed to the favorable repeatability of the droplet concentration results. In addition, the preparation method is flexible and has the potential for fluid mixing, fluid transport, and biochemical sensors, etc.

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