Electrical porous silicon sensor for detection of various organic molecules in liquid phase

2015 ◽  
Vol 212 (8) ◽  
pp. 1851-1857 ◽  
Author(s):  
Farid A. Harraz ◽  
Adel A. Ismail ◽  
Houcine Bouzid ◽  
Saleh A. Al-Sayari ◽  
Ali Al-Hajry ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Porous Silicon ◽  
Organic Molecules ◽  
Silicon Sensor

Surface Self-Diffusion of Organic Molecules Adsorbed in Porous Silicon

2005 ◽  
Vol 109 (12) ◽  
pp. 5746-5752 ◽  
Author(s):  
Rustem Valiullin ◽  
Pavel Kortunov ◽  
Jörg Kärger ◽  
Viktor Timoshenko
Keyword(s):  
Porous Silicon ◽  
Organic Molecules ◽  
Self Diffusion

scholarly journals Flow-Through Self-Standing Porous Silicon Sensor

Proceedings ◽  
2018 ◽  
Vol 4 (1) ◽  
pp. 17
Author(s):  
David Martín-Sánchez ◽  
Salvador Ponce-Alcántara ◽  
Jaime García-Rupérez
Keyword(s):  
Refractive Index ◽  
Porous Silicon ◽  
Multilayer Structure ◽  
Reflectance Spectra ◽  
Flow Through ◽  
Index Changes ◽  
Lift Off ◽  
Theoretical Simulations ◽  
Silicon Sensor ◽  
Good Agreement

A self-standing porous silicon (PS) multilayer structure detached from the substrate by the lift-off method and integrated with a microfluidic cell is presented. Experiments of refractive index changes sensing flow through open-ended pores are reported. We continuously recorded the reflectance spectra of the PS membrane each 30 s and measured the shift as different substances flowed through the structure. The experimental sensitivity values are in good agreement with the theoretical simulations performed.

Carbon Nanostructures Produced by Liquid Phase Exfoliation of Graphite in the Presence of Small Organic Molecules

2016 ◽  
Vol 3 (1) ◽  
Author(s):  
Jesús I. Tapia ◽  
Mildred Quintana
Keyword(s):  
Liquid Phase ◽  
Small Molecules ◽  
Carbon Nanostructures ◽  
Organic Molecules ◽  
Chemical Nature ◽  
Spectroscopy Analysis ◽  
Small Organic Molecules ◽  
Transmission Electron ◽  
Secondary Reactions ◽  
Carbon Nanoscrolls

AbstractWe report on the formation of different carbon nanostructures by ultrasonication of graphite in DMF upon the addition of 3 different small molecules: ferrocene carboxylic acid, dimethylamino methyl-ferrocene, and benzyl aldehyde. Our results confirm that acoustic cavitation in organic solvents generates free radicals which enable or are involved in secondary reactions. During the ultrasonication process, the addition of small molecules induces the formation of different carbon nanostructures mainly depending on the chemical nature of the molecule, as observed by transmission electron microscopy (TEM). Raman spectroscopy analysis confirms that small molecules act as radical scavengers reducing the damage caused by cavitation to graphene sheets producing long nanoribbons, squared sheets, or carbon nanoscrolls. Importantly, this strategy allows the production of different carbon nanostructures in liquid-phase making them readily available for their chemical functionalization or for their incorporation into hybrids materials enabling the development of new advanced biological applications.

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