9 research outputs found
Oxidation State of Capping Agent Affects Spatial Reactivity on Gold Nanorods
Despite
enormous progress toward controlling the shapes and surface
chemistry of colloidal nanoparticles, spatial control of nanoparticle
surface chemistry remains a major challenge. In recent years, there
have been tantalizing reports demonstrating anisotropic silica coating
of gold nanorods in which silica is deposited only on the sides by
functionalizing the nanorods with polyÂ(ethylene glycol) methyl ether
thiol (PEG-thiol) prior to silica coating, but such results have been
difficult to reproduce. We report that the oxidation state of PEG-thiol
is key to anisotropic silica coating, with the disulfide, not the
thiol, leading to side silica coating. PEG-disulfide appears to selectively
functionalize the ends of gold nanorods, and robust methods are developed
to reliably deposit side silica shells on PEG-disulfide functionalized
gold nanorods
Quadruple H‑Bonding Cross-Linked Supramolecular Polymeric Materials as Substrates for Stretchable, Antitearing, and Self-Healable Thin Film Electrodes
Herein,
we report a de novo chemical design of supramolecular polymer materials
(SPMs-<b>1</b>–<b>3</b>) by condensation polymerization,
consisting of (i) soft polymeric chains (polytetramethylene glycol
and tetraethylene glycol) and (ii) strong and reversible quadruple
H-bonding cross-linkers (from 0 to 30 mol %). The former contributes
to the formation of the soft domain of the SPMs, and the latter furnishes
the SPMs with desirable mechanical properties, thereby producing soft,
stretchable, yet tough elastomers. The resulting SPM-<b>2</b> was observed to be highly stretchable (up to 17 000% strain),
tough (fracture energy ∼30 000 J/m<sup>2</sup>), and
self-healing, which are highly desirable properties and are superior
to previously reported elastomers and tough hydrogels. Furthermore,
a gold, thin film electrode deposited on this SPM substrate retains
its conductivity and combines high stretchability (∼400%),
fracture/notch insensitivity, self-healing, and good interfacial adhesion
with the gold film. Again, these properties are all highly complementary
to commonly used polydimethylsiloxane-based thin film metal electrodes.
Last, we proceed to demonstrate the practical utility of our fabricated
electrode via both in vivo and in vitro measurements of electromyography
signals. This fundamental understanding obtained from the investigation
of these SPMs will facilitate the progress of intelligent soft materials
and flexible electronics
Quadruple H‑Bonding Cross-Linked Supramolecular Polymeric Materials as Substrates for Stretchable, Antitearing, and Self-Healable Thin Film Electrodes
Herein,
we report a de novo chemical design of supramolecular polymer materials
(SPMs-<b>1</b>–<b>3</b>) by condensation polymerization,
consisting of (i) soft polymeric chains (polytetramethylene glycol
and tetraethylene glycol) and (ii) strong and reversible quadruple
H-bonding cross-linkers (from 0 to 30 mol %). The former contributes
to the formation of the soft domain of the SPMs, and the latter furnishes
the SPMs with desirable mechanical properties, thereby producing soft,
stretchable, yet tough elastomers. The resulting SPM-<b>2</b> was observed to be highly stretchable (up to 17 000% strain),
tough (fracture energy ∼30 000 J/m<sup>2</sup>), and
self-healing, which are highly desirable properties and are superior
to previously reported elastomers and tough hydrogels. Furthermore,
a gold, thin film electrode deposited on this SPM substrate retains
its conductivity and combines high stretchability (∼400%),
fracture/notch insensitivity, self-healing, and good interfacial adhesion
with the gold film. Again, these properties are all highly complementary
to commonly used polydimethylsiloxane-based thin film metal electrodes.
Last, we proceed to demonstrate the practical utility of our fabricated
electrode via both in vivo and in vitro measurements of electromyography
signals. This fundamental understanding obtained from the investigation
of these SPMs will facilitate the progress of intelligent soft materials
and flexible electronics
Quadruple H‑Bonding Cross-Linked Supramolecular Polymeric Materials as Substrates for Stretchable, Antitearing, and Self-Healable Thin Film Electrodes
Herein,
we report a de novo chemical design of supramolecular polymer materials
(SPMs-<b>1</b>–<b>3</b>) by condensation polymerization,
consisting of (i) soft polymeric chains (polytetramethylene glycol
and tetraethylene glycol) and (ii) strong and reversible quadruple
H-bonding cross-linkers (from 0 to 30 mol %). The former contributes
to the formation of the soft domain of the SPMs, and the latter furnishes
the SPMs with desirable mechanical properties, thereby producing soft,
stretchable, yet tough elastomers. The resulting SPM-<b>2</b> was observed to be highly stretchable (up to 17 000% strain),
tough (fracture energy ∼30 000 J/m<sup>2</sup>), and
self-healing, which are highly desirable properties and are superior
to previously reported elastomers and tough hydrogels. Furthermore,
a gold, thin film electrode deposited on this SPM substrate retains
its conductivity and combines high stretchability (∼400%),
fracture/notch insensitivity, self-healing, and good interfacial adhesion
with the gold film. Again, these properties are all highly complementary
to commonly used polydimethylsiloxane-based thin film metal electrodes.
Last, we proceed to demonstrate the practical utility of our fabricated
electrode via both in vivo and in vitro measurements of electromyography
signals. This fundamental understanding obtained from the investigation
of these SPMs will facilitate the progress of intelligent soft materials
and flexible electronics
Quadruple H‑Bonding Cross-Linked Supramolecular Polymeric Materials as Substrates for Stretchable, Antitearing, and Self-Healable Thin Film Electrodes
Herein,
we report a de novo chemical design of supramolecular polymer materials
(SPMs-<b>1</b>–<b>3</b>) by condensation polymerization,
consisting of (i) soft polymeric chains (polytetramethylene glycol
and tetraethylene glycol) and (ii) strong and reversible quadruple
H-bonding cross-linkers (from 0 to 30 mol %). The former contributes
to the formation of the soft domain of the SPMs, and the latter furnishes
the SPMs with desirable mechanical properties, thereby producing soft,
stretchable, yet tough elastomers. The resulting SPM-<b>2</b> was observed to be highly stretchable (up to 17 000% strain),
tough (fracture energy ∼30 000 J/m<sup>2</sup>), and
self-healing, which are highly desirable properties and are superior
to previously reported elastomers and tough hydrogels. Furthermore,
a gold, thin film electrode deposited on this SPM substrate retains
its conductivity and combines high stretchability (∼400%),
fracture/notch insensitivity, self-healing, and good interfacial adhesion
with the gold film. Again, these properties are all highly complementary
to commonly used polydimethylsiloxane-based thin film metal electrodes.
Last, we proceed to demonstrate the practical utility of our fabricated
electrode via both in vivo and in vitro measurements of electromyography
signals. This fundamental understanding obtained from the investigation
of these SPMs will facilitate the progress of intelligent soft materials
and flexible electronics
Quadruple H‑Bonding Cross-Linked Supramolecular Polymeric Materials as Substrates for Stretchable, Antitearing, and Self-Healable Thin Film Electrodes
Herein,
we report a de novo chemical design of supramolecular polymer materials
(SPMs-<b>1</b>–<b>3</b>) by condensation polymerization,
consisting of (i) soft polymeric chains (polytetramethylene glycol
and tetraethylene glycol) and (ii) strong and reversible quadruple
H-bonding cross-linkers (from 0 to 30 mol %). The former contributes
to the formation of the soft domain of the SPMs, and the latter furnishes
the SPMs with desirable mechanical properties, thereby producing soft,
stretchable, yet tough elastomers. The resulting SPM-<b>2</b> was observed to be highly stretchable (up to 17 000% strain),
tough (fracture energy ∼30 000 J/m<sup>2</sup>), and
self-healing, which are highly desirable properties and are superior
to previously reported elastomers and tough hydrogels. Furthermore,
a gold, thin film electrode deposited on this SPM substrate retains
its conductivity and combines high stretchability (∼400%),
fracture/notch insensitivity, self-healing, and good interfacial adhesion
with the gold film. Again, these properties are all highly complementary
to commonly used polydimethylsiloxane-based thin film metal electrodes.
Last, we proceed to demonstrate the practical utility of our fabricated
electrode via both in vivo and in vitro measurements of electromyography
signals. This fundamental understanding obtained from the investigation
of these SPMs will facilitate the progress of intelligent soft materials
and flexible electronics
Quadruple H‑Bonding Cross-Linked Supramolecular Polymeric Materials as Substrates for Stretchable, Antitearing, and Self-Healable Thin Film Electrodes
Herein,
we report a de novo chemical design of supramolecular polymer materials
(SPMs-<b>1</b>–<b>3</b>) by condensation polymerization,
consisting of (i) soft polymeric chains (polytetramethylene glycol
and tetraethylene glycol) and (ii) strong and reversible quadruple
H-bonding cross-linkers (from 0 to 30 mol %). The former contributes
to the formation of the soft domain of the SPMs, and the latter furnishes
the SPMs with desirable mechanical properties, thereby producing soft,
stretchable, yet tough elastomers. The resulting SPM-<b>2</b> was observed to be highly stretchable (up to 17 000% strain),
tough (fracture energy ∼30 000 J/m<sup>2</sup>), and
self-healing, which are highly desirable properties and are superior
to previously reported elastomers and tough hydrogels. Furthermore,
a gold, thin film electrode deposited on this SPM substrate retains
its conductivity and combines high stretchability (∼400%),
fracture/notch insensitivity, self-healing, and good interfacial adhesion
with the gold film. Again, these properties are all highly complementary
to commonly used polydimethylsiloxane-based thin film metal electrodes.
Last, we proceed to demonstrate the practical utility of our fabricated
electrode via both in vivo and in vitro measurements of electromyography
signals. This fundamental understanding obtained from the investigation
of these SPMs will facilitate the progress of intelligent soft materials
and flexible electronics
Quadruple H‑Bonding Cross-Linked Supramolecular Polymeric Materials as Substrates for Stretchable, Antitearing, and Self-Healable Thin Film Electrodes
Herein,
we report a de novo chemical design of supramolecular polymer materials
(SPMs-<b>1</b>–<b>3</b>) by condensation polymerization,
consisting of (i) soft polymeric chains (polytetramethylene glycol
and tetraethylene glycol) and (ii) strong and reversible quadruple
H-bonding cross-linkers (from 0 to 30 mol %). The former contributes
to the formation of the soft domain of the SPMs, and the latter furnishes
the SPMs with desirable mechanical properties, thereby producing soft,
stretchable, yet tough elastomers. The resulting SPM-<b>2</b> was observed to be highly stretchable (up to 17 000% strain),
tough (fracture energy ∼30 000 J/m<sup>2</sup>), and
self-healing, which are highly desirable properties and are superior
to previously reported elastomers and tough hydrogels. Furthermore,
a gold, thin film electrode deposited on this SPM substrate retains
its conductivity and combines high stretchability (∼400%),
fracture/notch insensitivity, self-healing, and good interfacial adhesion
with the gold film. Again, these properties are all highly complementary
to commonly used polydimethylsiloxane-based thin film metal electrodes.
Last, we proceed to demonstrate the practical utility of our fabricated
electrode via both in vivo and in vitro measurements of electromyography
signals. This fundamental understanding obtained from the investigation
of these SPMs will facilitate the progress of intelligent soft materials
and flexible electronics
Quadruple H‑Bonding Cross-Linked Supramolecular Polymeric Materials as Substrates for Stretchable, Antitearing, and Self-Healable Thin Film Electrodes
Herein,
we report a de novo chemical design of supramolecular polymer materials
(SPMs-<b>1</b>–<b>3</b>) by condensation polymerization,
consisting of (i) soft polymeric chains (polytetramethylene glycol
and tetraethylene glycol) and (ii) strong and reversible quadruple
H-bonding cross-linkers (from 0 to 30 mol %). The former contributes
to the formation of the soft domain of the SPMs, and the latter furnishes
the SPMs with desirable mechanical properties, thereby producing soft,
stretchable, yet tough elastomers. The resulting SPM-<b>2</b> was observed to be highly stretchable (up to 17 000% strain),
tough (fracture energy ∼30 000 J/m<sup>2</sup>), and
self-healing, which are highly desirable properties and are superior
to previously reported elastomers and tough hydrogels. Furthermore,
a gold, thin film electrode deposited on this SPM substrate retains
its conductivity and combines high stretchability (∼400%),
fracture/notch insensitivity, self-healing, and good interfacial adhesion
with the gold film. Again, these properties are all highly complementary
to commonly used polydimethylsiloxane-based thin film metal electrodes.
Last, we proceed to demonstrate the practical utility of our fabricated
electrode via both in vivo and in vitro measurements of electromyography
signals. This fundamental understanding obtained from the investigation
of these SPMs will facilitate the progress of intelligent soft materials
and flexible electronics