Photoconductivity in Vacuum Deposited Films of Silicon-Based Polymers

1996 ◽  
Vol 444 ◽  
Author(s):  
H. Okumoto ◽  
M. Shimomura ◽  
N. Minami ◽  
Y. Tanabe
Keyword(s):  
Charge Transfer ◽  
Chemical Modification ◽  
Electronic Transport ◽  
Hole Transport ◽  
Electron Acceptors ◽  
Oxygen Atmosphere ◽  
Dangling Bonds ◽  
Silicon Based ◽  
Deposited Films

AbstractSilicon-based polymers with σconjugated electrons have specific properties; photoreactivity for microlithography and photoconductivity for hole transport materials. To explore the possibility of combining these two properties to develop photoresists with electronic transport capability, photoconductivity of polysilanes is investigated in connection with their photoinduced chemical modification. Increase in photocurrent is observed accompanying photoreaction of poly(dimethylsilane) vacuum deposited films. This increase is found to be greatly enhanced in oxygen atmosphere. Such changes of photocurrent can be explained by charge transfer to electron acceptors from Si dangling bonds postulated to be formed during photoreaction.

Ferrocene-modified oligopeptide as model compound for charge-transfer interactions with organic electron acceptors

2001 ◽  
Vol 18 (1-2) ◽  
pp. 121-124 ◽  
Author(s):  
Marek Pietraszkiewicz ◽  
Agnieszka Wieckowska ◽  
Renata Bilewicz ◽  
Aleksandra Misicka ◽  
Lucjan Piela ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Model Compound ◽  
Electron Acceptors ◽  
Organic Electron

scholarly journals Room temperature detection of individual molecular physisorption using suspended bilayer graphene

2016 ◽  
Vol 2 (4) ◽  
pp. e1501518 ◽  
Author(s):  
Jian Sun ◽  
Manoharan Muruganathan ◽  
Hiroshi Mizuta
Keyword(s):  
Charge Transfer ◽  
Electronic Transport ◽  
Density Functional ◽  
Room Temperature ◽  
Electrostatic Force ◽  
Bilayer Graphene ◽  
Resistance Response ◽  
Resistance Change ◽  
Back Gate ◽  
Temperature Detection

Detection of individual molecular adsorption, which represents the ultimate resolution of gas sensing, has rarely been realized with solid-state devices. So far, only a few studies have reported detection of individual adsorption by measuring the variation of electronic transport stemming from the charge transfer of adsorbate. We report room-temperature detection of the individual physisorption of carbon dioxide molecules with suspended bilayer graphene (BLG) based on a different mechanism. An electric field introduced by applying back-gate voltage is used to effectively enhance the adsorption rate. A unique device architecture is designed to induce tensile strain in the BLG to prevent its mechanical deflection onto the substrate by electrostatic force. Despite the negligible charge transfer from a single physisorbed molecule, it strongly affects the electronic transport in suspended BLG by inducing charged impurity, which can shut down part of the conduction of the BLG with Coulomb impurity scattering. Accordingly, we can detect each individual physisorption as a step-like resistance change with a quantized value in the BLG. We use density functional theory simulation to theoretically estimate the possible resistance response caused by Coulomb scattering of one adsorbed CO2 molecule, which is in agreement with our measurement.

Organic Halides as Electron Acceptors in Charge Transfer Compounds

Nature ◽  
1961 ◽  
Vol 189 (4759) ◽  
pp. 137-138 ◽  
Author(s):  
T. BJORVATTEN ◽  
O. HASSEL ◽  
CHR. RØMMING
Keyword(s):  
Charge Transfer ◽  
Electron Acceptors ◽  
Organic Halides
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