The nanocomposite of the invention is, therefore, ideal for use as a piezoelectric element in MEMS devices. The nanocomposite may be used to measure dynamic changes in mechanical variables, e. As the nanocomposite is multifunctional and not just piezoresistive, it can be used not only in sensors but also in actuators. The multifunctional polymer nanocomposite may be used to sense bio molecules or explosive molecules.
Further, the nanocomposite is amenable to being coated on a wide range of substrates while maintaining its multifunctional properties. The following experimental example is illustrative of the invention but not limitative of the scope thereof:. Commercially available BTO nanoparticles having an average particle size of 80 nm, tetragonal structure and spherical grain morphology were suspended in 1 ml of cyclopentanone.
The dispersion was probe sonicated at 4W for 20 minutes to obtain a uniform dispersion of the nanocomposite. Patterning the nanocomposite was done using standard UV photolithography. UV exposure through a photomask was done for seconds. Then the nanocomposite layer was developed using a standard SU-8 developer. The uncrosslinked SU-8 layer along with the uncrosslinked nanocomposite layer was removed during development, leaving behind the crosslinked nanocomposite patterns.
The developing time was 60 seconds. A final rinse in isopropyl alcohol IPA was done to remove weakly bonded BTO nanoparticles and other residues, leaving behind the desired nanocomposite patterns on the respective substrates. The number of peaks in the profile correspond to the number of nanoparticles in a defined scanning area.
The width of the peaks indicate that the width of each of the nanoparticles is about 80 nm. The minor differences in the heights of the peaks correspond to the minor differences in size of the nanoparticles. The non-overlapping nature of the peaks is indicative of the uniform dispersion of the BTO nanoparticles in SU-8 polymer. The nanocomposite shows low leakage of current upto 10V.
From FIG. According to FIG. It may be noted that in CMOS technology, one requires that the nanocomposite should show low leakage upto 5V. Thus, the present invention exceeds conventional requirements. From the saturated hysteresis loop in FIG. From the well saturated hysteresis loop in FIG.
What has been described and illustrated herein is a preferred embodiment of the invention along with some of its variations. The terms, descriptions and figures used herein are set forth by way of illustration only and are not meant as limitations.
Multifunctional Polymer Nanocomposites | Taylor & Francis Group
Those skilled in the art will recognize that many variations are possible within the spirit and scope of the invention, which is intended to be defined by the following claims—and their equivalents—in which all terms are meant in their broadest reasonable sense unless otherwise indicated. A photo-patternable multifunctional polymer nanocomposite comprising a solvent suspension of multiferroic nanostructures uniformly dispersed in SU-8 polymer matrix.
The photo-patternable multifunctional polymer nanocomposite as claimed in claim 1 , wherein the multiferroic nanostructures are in the size range of 2 nm to nm. The photo-patternable multifunctional polymer nanocomposite as claimed in claim 1 , wherein the solvent suspension of nanostructures comprises nanostructures suspended in cyclopentanone. A process for preparing a photo-patternable multifunctional polymer nanocomposite comprising making a suspension of multiferroic nanostructures in a solvent and then dispersing the said suspension in SU-8 polymer matrix. The process as claimed in claim 5 , wherein the nanostructures are in the size range of 2 nm to nm.
The process as claimed in claim 5 , wherein the thinner is cyclopentanone. A method of making a composite comprising a substrate and a photo-patterned multifunctional polymer nanocomposite layer formed on the substrate, wherein the photo-patterned multifunctional polymer nanocomposite layer is formed by: a dispersing a solvent suspension of multiferroic nanostructures in SU-8 polymer matrix;. The method as claimed in claim 9 , wherein the multiferroic nanostructures are in the size range of 2 nm to nm. The method as claimed in claim 9 , wherein the solvent suspension of nanostructures comprises nanostructures suspended in cyclopentanone.
The method as claimed in claim 9 , wherein the removal of weakly bonded multiferroic nanostructures in step f is done by rinsing the nanocomposite in a polar solvent. A composite comprising a substrate and a photo-patterned multifunctional polymer nanocomposite layer formed on the substrate, wherein the nanocomposite layer comprises a UV-photolithographed SU-8 polymer having a solvent suspension of multiferroic nanostructures uniformly dispersed in the polymer matrix.
The composite as claimed in claim 14 , wherein the multiferroic nanostructures are in the size range of 2 nm to nm. The composite as claimed in claim 16 , wherein the solvent suspension of nanostructures comprises nanostructures suspended in cyclopentanone. A MEMS device comprising the composite as claimed in claim 14 , wherein the nanocomposite layer acts as a piezoelectric element.
A transistor device comprising the composite as claimed in claim 14 , wherein the nanocomposite layer acts as a high-k element. USB2 en. WOA2 en. Piezoelectric polymer including nanostructures doped with ferromagnetic element with regular alignment and method of preparing the same. Composition for forming photosensitive polymer complex and method of preparing photosensitive polymer complex containing silver nanoparticles using the composition.
USA1 en. Fabrication of nanowire array composites for thermoelectric power generators and microcoolers. WOA3 en. Zhai et al. Wu et al. Lead zirconate titanate nanowire textile nanogenerator for wearable energy-harvesting and self-powered devices. Mannsfeld et al. Highly sensitive flexible pressure sensors with microstructured rubber dielectric layers.
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