scholarly journals Stimuli-Responsive Materials: Protein/Polymer-Based Dual-Responsive Gold Nanoparticles with pH-Dependent Thermal Sensitivity (Adv. Funct. Mater. 7/2012)

2012 ◽  
Vol 22 (7) ◽  
pp. 1322-1322 ◽  
Author(s):  
Malte S. Strozyk ◽  
Munish Chanana ◽  
Isabel Pastoriza-Santos ◽  
Jorge Pérez-Juste ◽  
Luis M. Liz-Marzán
Keyword(s):  
Gold Nanoparticles ◽  
Thermal Sensitivity ◽  
Stimuli Responsive ◽  
Responsive Materials ◽  
Protein Polymer ◽  
Dual Responsive ◽  
Ph Dependent

Protein/Polymer-Based Dual-Responsive Gold Nanoparticles with pH-Dependent Thermal Sensitivity

2012 ◽  
Vol 22 (7) ◽  
pp. 1436-1444 ◽  
Author(s):  
Malte S. Strozyk ◽  
Munish Chanana ◽  
Isabel Pastoriza-Santos ◽  
Jorge Pérez-Juste ◽  
Luis M. Liz-Marzán
Keyword(s):  
Gold Nanoparticles ◽  
Thermal Sensitivity ◽  
Protein Polymer ◽  
Dual Responsive ◽  
Ph Dependent

Smart Polymers and their Applications: A Review

2017 ◽  
Vol 8 (03) ◽  
Author(s):  
Gore S. A. ◽  
Gholve S. B. ◽  
Savalsure S. M. ◽  
Ghodake K. B. ◽  
Bhusnure O. G. ◽  
...  
Keyword(s):  
Oil Recovery ◽  
Water Soluble ◽  
Solution Temperature ◽  
Smart Polymers ◽  
Stimuli Responsive ◽  
Responsive Materials ◽  
Water Soluble Polymers ◽  
Commercial Applications ◽  
Stimuli Sensitive ◽  
External Stimuli

Smart polymers are materials that respond to small external stimuli. These are also referred as stimuli responsive materials or intelligent materials. Smart polymers that can exhibit stimuli-sensitive properties are becoming important in many commercial applications. These polymers can change shape, strength and pore size based on external factors such as temperature, pH and stress. The stimuli include salt, UV irradiation, temperature, pH, magnetic or electric field, ionic factors etc. Smart polymers are very promising applicants in drug delivery, tissue engineering, cell culture, gene carriers, textile engineering, oil recovery, radioactive wastage and protein purification. The study is focused on the entire features of smart polymers and their most recent and relevant applications. Water soluble polymers with tunable lower critical solution temperature (LCST) are of increasing interest for biological applications such as cell patterning, smart drug release, DNA sequencing etc.

Sensitive Mechanocontrolled Luminescence in Cross-Linked Polymer Films

2019 ◽  
Author(s):  
Ayumu Karimata ◽  
Pradnya Patil ◽  
Eugene Khaskin ◽  
Sébastien Lapointe ◽  
robert fayzullin ◽  
...  
Keyword(s):  
Mechanical Stress ◽  
Polymer Films ◽  
Soft Matter ◽  
Small Strain ◽  
Visual Methods ◽  
Photoluminescence Intensity ◽  
Stimuli Responsive ◽  
Responsive Materials ◽  
Highly Sensitive ◽  
Mechanical Stretching

Direct translation of mechanical force into changes in chemical behavior on a molecular level has important implication not only for the fundamental understanding of mechanochemical processes, but also for the development of new stimuli-responsive materials. In particular, detection of mechanical stress in polymers via non-destructive methods is important in order to prevent material failure and to study the mechanical properties of soft matter. Herein, we report that highly sensitive changes in photoluminescence intensity can be observed in response to the mechanical stretching of cross-linked polymer films when using stable, (pyridinophane)Cu-based dynamic mechanophores. Upon stretching, the luminescence intensity increases in a fast and reversible manner even at small strain (< 50%) and applied stress (< 0.1 MPa) values. Such sensitivity is unprecedented when compared to previously reported systems based on organic mechanophores. The system also allows for the detection of weak mechanical stress by spectroscopic measurements or by direct visual methods.<br>

scholarly journals Redox-State Dependent Spectroscopic Properties of Porous Organic Polymers Containing Furan, Thiophene, and Selenophene

2017 ◽  
Vol 70 (11) ◽  
pp. 1227 ◽  
Author(s):  
Carol Hua ◽  
Stone Woo ◽  
Aditya Rawal ◽  
Floriana Tuna ◽  
James M. Hook ◽  
...  
Keyword(s):  
Solid State ◽  
Redox State ◽  
Spectroscopic Properties ◽  
Structural Features ◽  
Organic Polymers ◽  
Stimuli Responsive ◽  
Porous Organic Polymers ◽  
Paramagnetic Resonance ◽  
Responsive Materials ◽  
State Dependent

A series of electroactive triarylamine porous organic polymers (POPs) with furan, thiophene, and selenophene (POP-O, POP-S, and POP-Se) linkers have been synthesised and their electronic and spectroscopic properties investigated as a function of redox state. Solid state NMR provided insight into the structural features of the POPs, while in situ solid state Vis-NIR and electron paramagnetic resonance spectroelectrochemistry showed that the distinct redox states in POP-S could be reversibly accessed. The development of redox-active porous organic polymers with heterocyclic linkers affords their potential application as stimuli responsive materials in gas storage, catalysis, and as electrochromic materials.

scholarly journals Shape memory polymer network with thermally distinct elasticity and plasticity

2016 ◽  
Vol 2 (1) ◽  
pp. e1501297 ◽  
Author(s):  
Qian Zhao ◽  
Weike Zou ◽  
Yingwu Luo ◽  
Tao Xie
Keyword(s):  
Shape Memory ◽  
Molecular Design ◽  
Shape Change ◽  
Shape Memory Polymer ◽  
Polymer Network ◽  
Stimuli Responsive ◽  
Responsive Materials ◽  
Device Applications ◽  
Temperature Ranges ◽  
Rational Molecular Design

Stimuli-responsive materials with sophisticated yet controllable shape-changing behaviors are highly desirable for real-world device applications. Among various shape-changing materials, the elastic nature of shape memory polymers allows fixation of temporary shapes that can recover on demand, whereas polymers with exchangeable bonds can undergo permanent shape change via plasticity. We integrate the elasticity and plasticity into a single polymer network. Rational molecular design allows these two opposite behaviors to be realized at different temperature ranges without any overlap. By exploring the cumulative nature of the plasticity, we demonstrate easy manipulation of highly complex shapes that is otherwise extremely challenging. The dynamic shape-changing behavior paves a new way for fabricating geometrically complex multifunctional devices.

scholarly journals Stimuli-Responsive Materials: Self-Adapting Wettability of ReS2 under a Constant Stimulus (Adv. Mater. 46/2018)

2018 ◽  
Vol 30 (46) ◽  
pp. 1870345
Author(s):  
Wenjie Wang ◽  
Jiaqian Zhang ◽  
Qin Zhang ◽  
Siyu Wan ◽  
Xiaohui Zhu ◽  
...  
Keyword(s):  
Constant Stimulus ◽  
Stimuli Responsive ◽  
Responsive Materials

scholarly journals Systematic exploration of the pH dependence of a peptide hydrogel

2019 ◽  
Vol 97 (6) ◽  
pp. 430-434 ◽  
Author(s):  
Natashya Falcone ◽  
Tsuimy Shao ◽  
Xiaoyi Sun ◽  
Heinz-Bernhard Kraatz
Keyword(s):  
Mechanical Strength ◽  
Narrow Range ◽  
Ph Dependence ◽  
Stimuli Responsive ◽  
Systematic Exploration ◽  
Ph Conditions ◽  
Ph Dependent ◽  
Functional Biomaterials ◽  
Peptide Hydrogel

Stimuli-responsive peptide gels are a growing class of functional biomaterials that are involved in many applications in research. Here, we present a novel di-peptide hydrogel from the compound Boc–Phe–Trp–OH in various buffer and pH conditions. We examine the effects of different stimuli, including temperature and pH, on the mechanical strength of the gels through frequency rheology studies. We found that this hydrogelator is highly pH dependent, only forming a gel in a narrow range of pH 6–7. This hydrogelator hold promise for the development of new stimuli-responsive biomaterials for specific applications that require this type of specific stimuli.

Thermoswitchable Janus Gold Nanoparticles with Stimuli-Responsive Hydrophilic Polymer Brushes

Langmuir ◽  
2016 ◽  
Vol 32 (17) ◽  
pp. 4297-4304 ◽  
Author(s):  
Xiaoqin Niu ◽  
Fen Ran ◽  
Limei Chen ◽  
Gabriella Jia-En Lu ◽  
Peiguang Hu ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Polymer Brushes ◽  
Hydrophilic Polymer ◽  
Stimuli Responsive
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