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Volume 7 Biosensors Journal
ISSN: 2090-4967 Electrochemistry 2018
June 11-12, 2018
June 11-12, 2018 | Rome, Italy
4th International Conference on Electrochemistry
Surface induced assembly of PTZ-TCNQ complex and its charge transport characteristics
Richa Mishra, Rajiv K Pandey and Rajiv Prakash
Banaras Hindu University, India
Tailoring of physical properties of π-framework containing organic molecules by tuning their non-covalent interactions
is an intensive research area. Non-covalent interactions among organic molecules can be intervened to assemble them
preferably via solution based processing methods. These solution processable materials can then be assembled with varying
morphology thus procuring appropriate physical properties requisite for the application desired. We are more interested
in processing organic synthetic metals for large area thin film based device applications. Organic charge transfer materials
particularly those containing 7,7,8,8-tetracyano-p-quinodimethane (TCNQ) as one precursor are in current scientific interest
due to its intrinsic (TCNQ¯) radical anion formation and astonishing electrical properties when complexed with strong
donors like tetrathiafulvalene (TTF), phenothiazine (PTZ), etc. Besides these gains, these complexes carry a limitation of not
forming flexible, uniform and ordered large area film in their pristine state thus restricting themselves in electronic device
applications. Here, it is a motivation to investigate morphology controlled assembly of donor-acceptor PTZ-TCNQ charge
transport complex on solid (hard) and liquid (soft) surfaces and their film formation. We have studied their surface (liquid and
solid) induced assembly via spin casting and Langmuir technique. Films fabricated from both soft and hard surfaces depicted
variation in crystalline morphology and surface topography that has been studied via SEM, TEM and AFM characterizations.
These assembled large area films have also shown variation in electrochemical properties and charge transport characteristics
as per their molecular arrangement and their stacking/orientation on the substrate. The main purpose of this study was to
substantiate the significant effect of surface induced processing methodology on the assembly of the PTZ-TCNQ complex
and its charge transport characteristics. We believe this study may open new dimension towards large area based organic
electronics device application of TCNQ based organic metals.
Recent Publications:
1. Zhang J, Gu P, Long G, Ganguly R, Li Y, Aratani N, Yamada H and Zhang Q (2016) Switching charge-transfer characteristics
from p-type to n-type through molecular “doping” (co-crystallization). Chem. Sci. 7:3851–3856.
2. Wu H D, Wang F X, Zhang M and Pan G B (2015) Investigation of transport properties of coronene-TCNQ cocrystal
microrods with coronene microrods and TCNQ microsheets. Nanoscale 7:12839-12842.
3. Krupskaya Y, Gibertini M, Marzari N and Morpurgo A F (2015) Band-like electron transport with record-high mobility
in the TCNQ family. Adv. Mater. 27:2453-2458.
4. Tseng H H, Serri M, Harrison N M and Heutz S (2015) Thin film properties of tetracyanoquinodimethane (TCNQ) with
novel templating effects. J. Mater. Chem. C 3:8694.
5. Zhu L, Yi Y, Fonari A, Corbin N S, Coropceanu V and Brédas J L (2014) Electronic properties of mixed-stack organic
charge-transfer crystals. J. Phys. Chem. C 26:14150-14156.
Biography
Richa Mishra has her expertise in self-assembly and processing of various organic materials for large area film formation via various techniques such as spin
coating, Langmuir-Blodgett and Langmuir-Schaeffer. Her successful effort in the area of ordered film fabrication of non-alkyl chain conducting polymers and other
п- conjugated materials has been recently recognized
Richa Mishra et al., Biosens J 2018, Volume 7
DOI: 10.4172/2090-4967-C1-002