Molecular orientation and femtosecond charge transfer dynamics in transparent and conductive electrodes based on graphene oxide and PEDOT:PSS composites

2019 ◽  
Vol 21 (2) ◽  
pp. 736-743 ◽  
Author(s):  
Bruno G. A. L. Borges ◽  
Soheila Holakoei ◽  
Mathues F. F. das Neves ◽  
Luana C. W. de Menezes ◽  
Carolina F. de Matos ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Charge Transfer ◽  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Molecular Orientation ◽  
Efficient Alternative ◽  
Organic Devices ◽  
Charge Transfer Dynamics ◽  
Alternative Structure

The combination of PEDOT:PSS and graphene oxide (GO) is an efficient alternative structure for indium tin oxide (ITO) in organic devices.

scholarly journals Electrochemical Impedance Characterization of Cell Growth on Reduced Graphene Oxide–Gold Nanoparticles Electrodeposited on Indium Tin Oxide Electrodes

2019 ◽  
Vol 9 (2) ◽  
pp. 326 ◽  
Author(s):  
Somasekhar Chinnadayyala ◽  
Jinsoo Park ◽  
Yonghyun Choi ◽  
Jae-Hee Han ◽  
Ajay Yagati ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Graphene Oxide ◽  
Cell Growth ◽  
Reduced Graphene Oxide ◽  
Tin Oxide ◽  
Indium Tin Oxide ◽  
Electrochemical Impedance ◽  
Hek293 Cells ◽  
Ito Electrode ◽  
Reduced Graphene

The improved binding ability of graphene–nanoparticle composites to proteins or molecules can be utilized to develop new cell-based assays. In this study, we fabricated reduced graphene oxide–gold nanoparticles (rGO-AuNP) electrodeposited onto a transparent indium tin oxide (ITO) electrode and investigated the feasibility of the electrochemical impedance monitoring of cell growth. The electrodeposition of rGO–AuNP on the ITO was optically and electrochemically characterized in comparison to bare, rGO-, and AuNP-deposited electrodes. The cell growth on the rGO–AuNP/ITO electrode was analyzed via electrochemical impedance measurement together with the microscopic observation of HEK293 cells transfected with a green fluorescent protein expression vector. The results showed that rGO–AuNP was biocompatible and induced an increase in cell adherence to the electrode when compared to the bare, AuNP-, or rGO-deposited ITO electrode. At 54 h cultivation, the average and standard deviation of the saturated normalized impedance magnitude of the rGO–AuNP/ITO electrode was 3.44 ± 0.16, while the value of the bare, AuNP-, and rGO-deposited ITO electrode was 2.48 ± 0.15, 2.61 ± 0.18, and 3.01 ± 0.25, respectively. The higher saturated value of the cell impedance indicates that the impedimetric cell-based assay has a broader measurement range. Thus, the rGO–AuNP/ITO electrode can be utilized for label-free and real-time impedimetric cell-based assays with wider dynamic range.

scholarly journals Tailoring ultra-fast charge transfer in MoS2

2020 ◽  
Vol 22 (18) ◽  
pp. 10335-10342 ◽  
Author(s):  
Fredrik O. L. Johansson ◽  
Ute B. Cappel ◽  
Mattis Fondell ◽  
Yuanyuan Han ◽  
Mihaela Gorgoi ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Charge Transfer ◽  
Single Crystal ◽  
Functional Materials ◽  
Fast Charge ◽  
Oxide Composite ◽  
Charge Transfer Dynamics ◽  
Materials Used

Charge transfer dynamics are of importance in functional materials used in devices. This property is morphology dependent in MoS2. Compared to a single crystal it is faster in a nanoparticle sample and even faster for a MoS2 graphene oxide composite.

Phosphonic Acid Functionalized Asymmetric Phthalocyanines: Synthesis, Modification of Indium Tin Oxide, and Charge Transfer

Langmuir ◽  
2011 ◽  
Vol 27 (24) ◽  
pp. 14900-14909 ◽  
Author(s):  
Nathan W. Polaske ◽  
Hsiao-Chu Lin ◽  
Anna Tang ◽  
Mayunk Mayukh ◽  
Luis E. Oquendo ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Tin Oxide ◽  
Phosphonic Acid ◽  
Indium Tin Oxide
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