Dear all, The next BNC Faculty Seminar will be this Thursday, 10/24 @ 12pm (lunch provided) in BRK 2001. Professor Miko Cakmak will be presenting. Miko Cakmak<https://www.purdue.edu/discoverypark/birck/directory/profile.php?resource_id=144060>, Reilly Professor of Materials and Mechanical Engineering will present a brief overview of his work on flexible electronics using Roll to Roll manufacturing for the first half then the remainder will be open for questions and high-level discussion of collaboration opportunities that can lead to future center of excellence and/or also brainstorm about a shared vision for Birck. Field Assisted "Z" orientation of Nanophases to Produce Thickness Functionalized films For Flexible Electronics using a New Roll to Roll manufacturing Platform Electric1,2, Magnetic3, and Thermal gradient5,6 fields are three important methods used in Field Assisted Self Assembly (FASA) of polymer blends, block copolymers, liquid crystals and polymer nanocomposites. These assisted assembly techniques have been used in laboratory scale, but for potential applications such as flexible electronics7, membranes8, supercapacitors, fuel cells, photovoltaic’s etc. a large scale manufacturing platform is needed. We introduce a novel roll to roll process developed in our laboratories to achieve "Z-direction" alignment of nanostructural units. A 40ft line was designed which uses a casting system to deposit desired thickness of liquid such as a monomer ,polymer solution as well as melt up to 6" wide on a flexible substrate. The substrate is then carried to an electric field application zone which consists of temperature controlled opposing roll to roll electrodes. The electric field applied can be a DC, AC or a biased AC, hence using the various fields we can maximize the orientation by increasing the dielectric contrast between the particles and the matrix. [MicroCT of 100micrometer thick film with Z aligned Nickel nanoparticle column forest]If orientation and self-assembly through magnetic field is desired, the second tool located downstream is activated. This electromagnet is capable of applying magnetic fields up to 2.2 T to the material supported by a flexible substrate through the opposing poles. This line also contains a movable UV lamp which can be used to freeze the structure of required morphology using photocurable resin after electric field or magnetic field application zones. Electric and magnetic field alignment of particles and polymer chains is studied through real time birefringence measurement, to determine various parameters effecting the orientation of particles/phases inside a polymeric film under the magnetic or electric field. The birefringence system is based on the solution drying process developed in our lab9. In this talk, we will review our recent results on the use of this machine to produce Z-( thickness direction) functional films for capacitors, piezoelectric sensors, nanogenerators and transparent audio speakers10, and piezoresistive 11,12 films. Please find below the BNC Fall Faculty Seminar Series Schedule. Date Faculty Topic 10/24/19 Miko Cakmak Reilly Professor of Materials and Mechanical Engineering Nanomanufacturing 10/31/19 Babak Anasori Assistant Professor, Dept of Mechanical and Energy Engineering, IUPUI 2D Transition Metal Carbides and Nitrides (MXenes): Advances, Challenges, and Opportunities 11/7/19 Hugh Lee Assistant Professor of Biomedical Engineering Implantable Microsystems 11/14/19 Amy Marconett Associate Professor of Mechanical Engineering ***Alternate Time: 12:30pm - 1:30pm*** Thermal and Energy Conversion 11/21/19 Wenzhuo Wu Ravi and Eleanor Talwar Rising Star Assistant Professor of Industrial Engineering Innovating nanotechnologies through the design, nanomanufacturing, and integration of functional materials with controlled composition and architecture across multiple length scales. Applications in sensing, renewable energy, electronics and wearable devices. 11/28/19 Thanksgiving Break 12/5/19 Luna Lu Associate Professor of Civil Engineering with courtesy appointmen in Materials Science and Engineering Sustainable Materials and Renewable Technology 12/12/19 Finals Week Thank you! Jaime Turner Administrative Assistant to the Director Birck Nanotechnology Center | Room 1027 | W. Lafayette, IN Office: 765.494.3509 | Fax: 765.496.8383 | Email: jjturner@purdue.edu<mailto:jjturner@purdue.edu> ______________________________________________________________ [https://www.purdue.edu/brand/images/Purdue_University-150_Years_of_Giant_Lea...] www.purdue.edu/giantleaps<http://www.purdue.edu/giantleaps>
