ORAL
| SESSION: AdvancedMaterialsMonAM-R8 | Marquis International Symposium on New and Advanced Materials and Technologies for Energy, Environment and Sustainable Development(3rd Intl Symp. on New and Advanced Materials and Technologies for Energy, Environment and Sustainable Development) |
| Mon Oct, 23 2017 | Room: Maria Luisa & Maria Fernanda |
| Session Chairs: Sandeep Thakare; Parvez Alam; Session Monitor: TBA |
15:30: [AdvancedMaterialsMonAM07] Keynote
Multifunctional Chromogenic Sensors Enabled by Novel Multi-Stimuli-Responsive Shape Memory Polymers Peng
Jiang1 ;
1University of Florida, Gainesville, United States;
Paper Id: 199
[Abstract] Here we report novel chromogenic sensors that exhibit easily perceived color changes when exposed to different external stimuli, such as pressure, shear stress, ballistic impact, a large variety of vapors and liquids, heat, and acoustic wave. These multifunctional sensors are reusable, inexpensive, light weight, consuming no electrical power, and very small footprint, promising for a spectrum of applications ranging from user-friendly environmental monitoring to specifically sensing chemicals. This new technology is enabled by integrating scientific principles drawn from two disparate fields that do not typically intersect  the fast-growing photonic crystal and shape memory polymer (SMP) technologies. The active components of the SMPs are thin macroporous photonic crystal layers (only a few m thick) which are fabricated by using self-assembled, 3-D highly ordered colloidal crystals as structural templates. This microscopic thin-film configuration renders orders of magnitude faster response speed than bulky SMP samples in traditional applications. In addition, by leveraging easily perceived color changes associated with the unconventional all-room-temperature shape memory cycles enabled by the recent discovery of a new series of multi-stimuli-responsive SMPs, sensitive and specific detection of an analyte in a multicomponent solution, such as ethanol in gasoline with a detection limit of 10 ppm, has been demonstrated. Moreover, we have demonstrated the sensitive detection of a trace amount of benzene-toluene-xylene (BTX) in contaminated water using these novel chromogenic sensors. Furthermore, our approach provides a simple and sensitive optical technique for investigating the intriguing shape memory effects at nanoscale, which is a topic that has received little examination.
