Unprecedented dipole alignment in α-phase nylon-11 nanowires for high-performance energy-harvesting applications

Choi, Yeon Sik; Kim, Sung Kyun; Smith, Michael; Williams, Findlay; Vickers, M. E.; Elliott, James A.; Kar‐Narayan, Sohini

doi:10.1126/sciadv.aay5065

Cited by 43 publications

(50 citation statements)

References 73 publications

(74 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…α-phase Nylon-11 nanowire-based triboelectric generator also exhibits robust mechanical stability with a negligible change in output current density over the entire period of fatigue testing (≈540 000 cycles) and during long-term reliability testing (~2 weeks). 41 These results therefore show the capabilities and feasibility of Nylon-11 nanowires as a promising material for triboelectric energy harvesting devices.…”

Section: Nylon-11 Nanowire-based Triboelectric Devicesmentioning

confidence: 66%

“…Changes in X‐ray diffraction (XRD) patterns with different processing conditions, A, RT solution concentration (wt%) variation in standard atmospheric conditions (flow rate ~0 m/s); B, gas‐flow variation of 10 wt% solution at RT; and, C, RT solution wt% variation with gas‐flow (3 m/s); D, temperature variation of 10 wt% solution in solvent vapor rich atmosphere; E, solution wt% variation in solvent vapor rich atmosphere at constant temperature of 80°C. Reproduced with permission from Reference 20 2017, The Royal Society of Chemistry, and Reference 41 2020, American Association for the Advancement of Science…”

Section: Advanced Template‐assisted Methods For Nylon‐11 Nanowire Fabmentioning

confidence: 99%

“…[38][39][40] Figure 3 shows the simulated molecular structure of δ 0 and α-phase Nylon-11. 41 Unpoled δ 0 -phase has randomly oriented Nylon-11 chains within a pseudohexagonal unit cell 35,41 (Figure 3A), while poled δ 0 -phase has the aligned structure ( Figure 3B). Figure 3C shows that α-phase Nylon-11 can also have a well-aligned molecular structure without the need for subsequent stretching and/or electrical poling process due to the well-organized hydrogen bond.…”

Section: Crystal Structures and Ferroelectric Behavior Of Nylon-11mentioning

confidence: 99%

“…Gray spheres represent carbon atoms, red spheres oxygen atoms, blue spheres nitrogen atoms, and white spheres hydrogen atoms. Reproduced with permission from Reference 41 2020, American Association for the Advancement of Science…”

Section: Crystal Structures and Ferroelectric Behavior Of Nylon‐11mentioning

confidence: 99%

See 3 more Smart Citations

Nylon‐11 nanowires for triboelectric energy harvesting

Choi

Kar‐Narayan

2020

EcoMat

Self Cite

View full text Add to dashboard Cite

Triboelectric energy harvesting from ambient mechanical sources relies on motion-generated surface charge transfer between materials with different electron affinities. In order to achieve highly efficient energy harvesting performance, choosing materials with a high surface charge density is crucial, and odd-numbered polyamides (Nylons), such as Nylon-11, are particularly promising due to their strong electron-donating characteristics and the possibility to achieve dipolar alignment leading to high surface potential. The use of Nylon-11 as a material for triboelectric energy harvesting has been rather limited due to the extreme processing conditions required for film fabrication, and the high-voltage poling process required for dipole alignment. However, several methods to achieve "self-poled" Nylon-11 nanowires via facile nanoconfinement techniques have been demonstrated recently, leading to highly efficient Nylon-11 nanowire-based triboelectric nanogenerators. Here, we review the most recent advances in the fabrication of Nylon-11 nanowires, with a focus on how nanoconfinement-based fabrication methods can be used to control phase and crystallinity. These growth methods lead to self-poled nanowires without the requirement for subsequent electrical poling, facilitating their integration into triboelectric energy harvesting devices. Strategies to fabricate Nylon-11 nanowires for applications in triboelectric devices can be extended to other polymeric families as well.

show abstract

Section: Nylon-11 Nanowire-based Triboelectric Devicesmentioning

confidence: 66%

Section: Advanced Template‐assisted Methods For Nylon‐11 Nanowire Fabmentioning

confidence: 99%

Section: Crystal Structures and Ferroelectric Behavior Of Nylon-11mentioning

confidence: 99%

Section: Crystal Structures and Ferroelectric Behavior Of Nylon‐11mentioning

confidence: 99%

See 2 more Smart Citations

Nylon‐11 nanowires for triboelectric energy harvesting

Choi

Kar‐Narayan

2020

EcoMat

Self Cite

View full text Add to dashboard Cite

show abstract

“…The advantage of the MEMS-based sensor is a lower power requirement and lower sensitivity to artifacts, which can strongly influence photoplethysmography-based measurements, such as misplaced or ill-fitting sensors [ 134 ]. It is expected that MEMS-based heart rate monitoring will become a larger area of interest in the future with the advent of self-powered sensors [ 135 , 136 ].…”

Section: Mechanical Biosensorsmentioning

confidence: 99%

Biosensors Based on Mechanical and Electrical Detection Techniques

Chalklen

Jing

Kar‐Narayan

2020

Sensors

Self Cite

View full text Add to dashboard Cite

Biosensors are powerful analytical tools for biology and biomedicine, with applications ranging from drug discovery to medical diagnostics, food safety, and agricultural and environmental monitoring. Typically, biological recognition receptors, such as enzymes, antibodies, and nucleic acids, are immobilized on a surface, and used to interact with one or more specific analytes to produce a physical or chemical change, which can be captured and converted to an optical or electrical signal by a transducer. However, many existing biosensing methods rely on chemical, electrochemical and optical methods of identification and detection of specific targets, and are often: complex, expensive, time consuming, suffer from a lack of portability, or may require centralised testing by qualified personnel. Given the general dependence of most optical and electrochemical techniques on labelling molecules, this review will instead focus on mechanical and electrical detection techniques that can provide information on a broad range of species without the requirement of labelling. These techniques are often able to provide data in real time, with good temporal sensitivity. This review will cover the advances in the development of mechanical and electrical biosensors, highlighting the challenges and opportunities therein.

show abstract

Bioinspired Multistimulus‐Responsive Piezoelectric Polymeric Nanoheterostructures via Interface‐Confined Configurations

Cui,

Wang,

Zhang

et al. 2024

Adv Funct Materials

View full text Add to dashboard Cite

Developing polymer‐based piezoelectric materials with multistimulus responsiveness is highly desirable for advancing multi‐source energy harvesting in wearable electronics. Inspired by the multifunctionality of muscle fibers, a nanostructure interface engineering strategy to create piezoelectric polymeric nanoheterostructures (PNHs) with remarkable responsiveness to both mechanical and nonmechanical contactless stimuli is introduced. Through precise interfacing of polymer nanofibers with nanoparticles via multiscale‐regulated interface electrostatic and chemical interactions, the study achieves a controlled assembly of stabilized and hierarchically organized nanoheterostructures featuring unique interface‐confined configurations. These configurations induce in situ stabilized dipole orientation and significant geometric stress nano‐confinement at interfaces, crucial for amplifying electricity generation. Compared to conventional polymer nanocomposites, engineered PNHs exhibit dramatically enhanced piezoelectricity, boasting a higher sensitivity of 1065 mV kPa−1 and piezoelectric coefficient of 76.2 pC N−1. Furthermore, PNHs demonstrate superior thermo‐actuated electricity generation under temperature fluctuations through cooperative spontaneous polarizations of constituent nanostructures, yielding a higher pyroelectric coefficient of 3.13 µC m2K−1. Additionally, the design enables photothermally‐activated switchable electricity generation and light‐energy harvesting, achieving a photo‐electric conversion efficiency tenfold higher than nanocomposites. This effective and versatile approach inspires the development of multi‐responsive nanogenerators for multi‐energy harvesting and self‐powered multistimulus‐sensing applications.

show abstract

Unprecedented dipole alignment in α-phase nylon-11 nanowires for high-performance energy-harvesting applications

Cited by 43 publications

References 73 publications

Nylon‐11 nanowires for triboelectric energy harvesting

Nylon‐11 nanowires for triboelectric energy harvesting

Biosensors Based on Mechanical and Electrical Detection Techniques

Bioinspired Multistimulus‐Responsive Piezoelectric Polymeric Nanoheterostructures via Interface‐Confined Configurations

Contact Info

Product

Resources

About