thermal management; SU-8 composites; carbon nanostructures; channeling of charged particles
Grimaldi Claudio, Kecsenovity Egon, Majidian Maryam, Kuznetsov Vladimir L., Magrez Arnaud, Forró László (2019), Electrical transport in onion-like carbon—PMMA nanocomposites, in Applied Physics Letters
, 114(10), 103102-103102.
Majidian Maryam, GrimaldiClaudio, ForroLaszlo, MagrezArnaud (2017), Role of the particle size polydispersity in the electrical conductivity of carbon nanotube-epoxy composites, in Scientific Reports
SU-8 is a negative tone epoxy resin, which has been first developed for pattern transfer application. The intrinsic properties and in particular the chemical and mechanical robustness led the MEMS community to use it for fabricating structural and active components of their device. SU-8 is widely used for the fabrication of high aspect ratio structures. However, the polymer is insulating and brittle. The production of conducting and reinforced SU-8 is yet to be realized. In the previous projects (NSF 200020-121814) and (NSF 200021_140557), we have developed carbon nanotubes and graphene based composites. High quality and homogeneous materials were prepared and characterized. Conductive composites were obtained with enhanced mechanical properties. The composites can be deposited as thin films and patterned with high resolution by photolithography.We ask for the prolongation of the project. First, Maryam Majidian has undertaken an extensive structural characterization of the composites, which needs to be completed. Additional measurements of the mechanical properties of the graphene based composites needs to be performed to confirm the 2-fold increase of the Young’s modulus of the composites as compared to pure SU8. Novel composites will be prepared using Onion like Carbon as fillers to complete the study of percolation behavior of SU-8 composites materials as a function of fillers morphology (comparison with nanotubes and graphene based composites). If the project is funded, three types of composites will be available. They are of great interest for MEMS as well as energy related applications to name just a few. The last part of the project is oriented towards fundamental research with more detailed investigations of percolation behavior of nanotubes based SU-8 composites. It is also oriented towards innovative applications, namely thermal management (thanks to the high thermal conductivity of the CNTs) and channeling of charged particles (thanks to the inner tube diameter which can easily be tuned).In conclusion, this multidisciplinary project aims at the preparation of novel carbon nanostructures based composite materials, which could be applied in a large spectrum of applications for fundamental as well as applied research including MEMS, bio-applications or energy related applications.