Lista de obras - Wen-Chang Chen - Dominio Público Uruguay

2D Cs2Pb(SCN)2Br2-based Photomemory Devices Showing a Photo-Induced Recovery Behavior and an Unusual Fully Optically-Driven Memory Behavior

scientific article published on 23 July 2020

A Novel Benzoxazole-Containing Poly(N-isopropylacrylamide) Copolymer as a Multifunctional Sensing Material

article published in 2007

A cross-disciplinary overview of naturally derived materials for electrochemical energy storage

A poly(fluorene-thiophene) donor with a tethered phenanthro[9,10-d]imidazole acceptor for flexible nonvolatile flash resistive memory devices.

artículo científico publicado en 2012

A silole copolymer containing a ladder-type heptacylic arene and naphthobisoxadiazole moieties for highly efficient polymer solar cells

A supramolecular approach on using poly(fluorenylstyrene)-block-poly(2-vinylpyridine):PCBM composite thin films for non-volatile memory device applications.

artículo científico publicado en 2011

Advances and challenges of green materials for electronics and energy storage applications: from design to end-of-life recovery

Alcohol-Soluble Cross-Linked Poly( nBA) n- b-Poly(NVTri) m Block Copolymer and Its Applications in Organic Photovoltaic Cells for Improved Stability

scientific article published on 11 December 2018

Asymmetric Side-Chain Engineering of Isoindigo-Based Polymers for Improved Stretchability and Applications in Field-Effect Transistors

scientific article published on 05 September 2019

Backbone Engineering of Diketopyrrolopyrrole-Based Conjugated Polymers through Random Terpolymerization for Improved Mobility-Stretchability Property

artículo científico publicado en 2020

Bio-Based Transparent Conductive Film Consisting of Polyethylene Furanoate and Silver Nanowires for Flexible Optoelectronic Devices

artículo científico publicado en 2018

Carbohydrate-Based Block Copolymer Thin Films: Ultrafast Nano-Organization with 7 nm Resolution Using Microwave Energy

artículo científico publicado en 2017

Conjugated donor-acceptor-acceptor (D-A-A) molecule for organic nonvolatile resistor memory

artículo científico publicado en 2014

Conjugated fluorene based rod-coil block copolymers and their PCBM composites for resistive memory switching devices.

artículo científico publicado en 2011

Control of thermoresponsive property of urea end-functionalized poly(N-isopropylacrylamide) based on the hydrogen bond-assisted self-assembly in water

article

Correlating Nanomorphology with Charge-Transport Anisotropy in Conjugated-Polymer Thin Films

Development of Block Copolymers with Poly(3-hexylthiophene) Segments as Compatibilizers in Non-Fullerene Organic Solar Cells

artículo científico publicado en 2020

Diketopyrrolopyrrole-thiophene-based acceptor-donor-acceptor conjugated materials for high-performance field-effect transistors.

artículo científico publicado en 2013

Donor-Acceptor Core-Shell Nanoparticles and Their Application in Non-Volatile Transistor Memory Devices

scientific article published on 25 April 2019

Donor-acceptor oligoimides for application in high-performance electrical memory devices

artículo científico publicado en 2013

Effective interfacial layer to enhance efficiency of polymer solar cells via solution-processed fullerene-surfactants

Effects of chain architectures on the surface structures of conjugated rod-coil block copolymer brushes.

artículo científico publicado en 2008

Efficient and UV-stable perovskite solar cells enabled by side chain-engineered polymeric hole-transporting layers

artículo científico publicado en 2018

Electrochemical study on screen-printed carbon electrodes with modification by iron nanoparticles in Fe(CN)(6) (4-/3-) redox system.

artículo científico publicado en 2005

Electrospun polymer nanofibers of P(NIPAAm- co -SA- co -FBPY): Preparation, structural control, metal ion sensing and thermoresponsive characteristics

Enhanced Charge Transport and Stability Conferred by Iron(III)-Coordination in a Conjugated Polymer Thin-Film Transistors

scientific article from 2018

Enhanced Near-Infrared Photoresponse of Inverted Perovskite Solar Cells Through Rational Design of Bulk-Heterojunction Electron-Transporting Layers

scientific article published on 01 September 2019

Enhancement of irradiation effects on cancer cells by cross-linked dextran-coated iron oxide (CLIO) nanoparticles

artículo científico publicado en 2009

Evaluation of structure–property relationships of solution-processible fullerene acceptors and their n-channel field-effect transistor performance

article

High Performance Nonvolatile Transistor Memories Utilizing Functional Polyimide-Based Supramolecular Electrets

artículo científico publicado en 2016

High Performance Transparent Transistor Memory Devices Using Nano-Floating Gate of Polymer/ZnO Nanocomposites.

artículo científico publicado en 2016

High-Efficiency Polymer Solar Cells Achieved by Doping Plasmonic Metallic Nanoparticles into Dual Charge Selecting Interfacial Layers to Enhance Light Trapping

High-Mobility Air-Stable Solution-Shear-Processed n-Channel Organic Transistors Based on Core-Chlorinated Naphthalene Diimides

article

High-Performance Air-Stable n-Type Organic Transistors Based on Core-Chlorinated Naphthalene Tetracarboxylic Diimides

article

High-Performance Nonvolatile Organic Photonic Transistor Memory Devices using Conjugated Rod-Coil Materials as a Floating Gate

scientific article published on 23 July 2020

High-Performance Nonvolatile Transistor Memories of Pentacence Using the Green Electrets of Sugar-based Block Copolymers and Their Supramolecules

article

High-k polymer-graphene oxide dielectrics for low-voltage flexible nonvolatile transistor memory devices.

artículo científico publicado en 2014

High-performance nonvolatile organic transistor memory devices using the electrets of semiconducting blends.

artículo científico publicado en 2014

Improved Charge Transport and Absorption Coefficient in Indacenodithieno[3,2-b]thiophene-based Ladder-Type Polymer Leading to Highly Efficient Polymer Solar Cells

artículo científico publicado en 2012

Improving the Performance and Stability of Perovskite Light-Emitting Diodes by a Polymeric Nanothick Interlayer-Assisted Grain Control Process

artículo científico publicado en 2020

Improving the characteristics of an organic nano floating gate memory by a self-assembled monolayer.

artículo científico publicado en 2012

Influence of polymeric electrets on the performance of derived hybrid perovskite-based photo-memory devices

artículo científico publicado en 2018

Intrinsically Stretchable Nanostructured Silver Electrodes for Realizing Efficient Strain Sensors and Stretchable Organic Photovoltaics

artículo científico publicado en 2017

Low-temperature electrodeposited crystalline SnO2 as an efficient electron-transporting layer for conventional perovskite solar cells

artículo científico publicado en 2017

Morphology and pH Sensing Characteristics of New Luminescent Electrospun Fibers Prepared from Poly(phenylquinoline)-block-Polystyrene/Polystyrene Blends

artículo científico publicado en 2009

Multifunctional Electrospun Nanofibers Prepared from Poly((N-isopropylacrylamide)-co-(N-hydroxymethylacrylamide)) and Their Blends with 1,2-Diaminoanthraquinone for NO Gas Detection

article

Multilevel Photonic Transistor Memory Devices Using Conjugated/Insulated Polymer Blend Electrets

scientific article published on 30 October 2019

Multilevel nonvolatile flexible organic field-effect transistor memories employing polyimide electrets with different charge-transfer effects.

artículo científico publicado en 2014

Nano-Micro Dimensional Structures of Fiber-Shaped Luminous Halide Perovskite Composites for Photonic and Optoelectronic Applications

artículo científico publicado en 2020

Nanostructure- and Orientation- Controlled Resistive Memory Behaviors of Carbohydrate-block-Polystyrene with Different Molecular Weights Via Solvent Annealing

scientific article published on 24 April 2020

Network structures of polyhedral oligomeric silsesquioxane based nanocomposites: a Monte Carlo study.

artículo científico publicado en 2004

Non-halogenated solvents for environmentally friendly processing of high-performance bulk-heterojunction polymer solar cells

Non-volatile memory devices based on polystyrene derivatives with electron-donating oligofluorene pendent moieties.

artículo científico publicado en 2009

Non-volatile organic transistor memory devices using the poly(4-vinylpyridine)-based supramolecular electrets

artículo científico publicado en 2015

Non-volatile transistor memory devices using charge storage cross-linked core-shell nanoparticles

artículo científico publicado en 2016

Non-woven and aligned electrospun multicomponent luminescent polymer nanofibers: effects of aggregated morphology on the photophysical properties

artículo científico publicado en 2009

Nonvolatile Perovskite-Based Photomemory with a Multilevel Memory Behavior.

artículo científico publicado en 2017

Nonvolatile organic thin film transistor memory devices based on hybrid nanocomposites of semiconducting polymers: gold nanoparticles.

artículo científico publicado en 2013

Oligosaccharide Carbohydrate Dielectrics toward High-Performance Non-volatile Transistor Memory Devices

artículo científico publicado en 2015

One-pot synthesis of AuPt alloyed nanoparticles by intense x-ray irradiation

scientific article published on 07 January 2011

One-pot tuning of Au nucleation and growth: from nanoclusters to nanoparticles

artículo científico publicado en 2011

Organic-Inorganic Nanocomposite Film for High-Performance Stretchable Resistive Memory Device

artículo científico publicado en 2019

Poly[2,7-(9,9-dihexylfluorene)]-block-Poly(2-vinylpyridine) Rod-Coil Star-block Copolymers: Synthesis, Micellar Structures, and Photophysical Properties

article

RGB-Switchable Porous Electrospun Nanofiber Chemoprobe-Filter Prepared from Multifunctional Copolymers for Versatile Sensing of pH and Heavy Metals.

artículo científico publicado en 2017

Realization of Intrinsically Stretchable Organic Solar Cells Enabled by Charge-Extraction Layer and Photoactive Material Engineering

artículo científico publicado en 2018

S,N-Heteroacene-Based Copolymers for Highly Efficient Organic Field Effect Transistors and Organic Solar Cells: Critical Impact of Aromatic Subunits in Ladder π-System.

artículo científico publicado en 2018

Single-crystal C60 needle/CuPc nanoparticle double floating-gate for low-voltage organic transistors based non-volatile memory devices

artículo científico publicado en 2014

Solution-shear-processed quaterrylene diimide thin-film transistors prepared by pressure-assisted thermal cleavage of swallow tails.

artículo científico publicado en 2011

Solvent Effects on Morphology and Electrical Properties of Poly(3-hexylthiophene) Electrospun Nanofibers

scientific article published on 14 September 2019

Stimuli-responsive conjugated rod-coil block copolymers: Synthesis, morphology, and applications

Stretchable Fluorescent Polyfluorene/Acrylonitrile Butadiene Rubber Blend Electrospun Fibers through Physical Interaction and Geometrical Confinement.

artículo científico publicado en 2017

Stretchable Polymer Dielectrics for Low-Voltage-Driven Field-Effect Transistors.

artículo científico publicado en 2017

Stretchable and Ambient Stable Perovskite/Polymer Luminous Hybrid Nanofibers of Multicolor Fiber Mats and Their White LED Applications

scientific article published on 18 June 2019

Study on Intrinsic Stretchability of Diketopyrrolopyrrole-based π-Conjugated Copolymers with Poly(acryl amide) Side-chains for Organic Field-effect Transistors

artículo científico publicado en 2020

Supramolecular block copolymers: graphene oxide composites for memory device applications.

artículo científico publicado en 2011

Syntheses of 4-Indolylquinoline Derivatives via Reductive Cyclization of Indolylnitrochalcone Derivatives by Fe/HCl.

artículo científico publicado en 2015

Synthesis of Bicyclic Isoxazoles and Isoxazolines via Intramolecular Nitrile Oxide Cycloaddition

artículo científico publicado en 2015

Synthesis of monodispersed polystyrene–silver core–shell particles and their application in the fabrication of stretchable large-scale anisotropic conductive films

Synthesis of multifunctional poly(1-pyrenemethyl methacrylate)-b-poly(N-isopropylacrylamide)-b-poly(N-methylolacrylamide)s and their electrospun nanofibers for metal ion sensory applications

Synthesis, Morphology, and Sensory Applications of Multifunctional Rod–Coil–Coil Triblock Copolymers and Their Electrospun Nanofibers

scientific article published on 02 July 2012

Synthesis, crystal structure, structure-activity relationships, and antiviral activity of a potent SARS coronavirus 3CL protease inhibitor

artículo científico publicado en 2006

Synthesis, thermomorphic characteristics, and fluorescent properties of poly[2,7-(9,9-dihexylfluorene)]-block-poly(N-isopropylacrylamide)-block-poly(N-hydroxyethylacrylamide) rod-coil-coil triblock copolymers

Theoretical analysis on the refractive-index distribution and bandwidth of gradient-index polymer optical fibers from a centrifugal field

artículo científico publicado en 2003

Theoretical and experimental studies on the surface structures of conjugated rod-coil block copolymer brushes

artículo científico publicado en 2007

Thermoresponsive Behaviors of Poly(oxypropylene)-amidoamine Functionalized Carbon Nanotubes

Thermoresponsive Luminescent Electrospun Fibers Prepared From Poly(DMAEMA-co-SA-co-StFl) Multifunctional Random Copolymers

article

Thin film morphologies of pi-conjugated rod-coil block copolymers with thermoresponsive property: a combined experimental and molecular simulation study

artículo científico publicado en 2010

Toward High-Performance Semi-Transparent Polymer Solar Cells: Optimization of Ultra-Thin Light Absorbing Layer and Transparent Cathode Architecture

article by Chu-Chen Chueh et al published 12 November 2012 in Advanced Energy Materials

Transparent deoxyribonucleic acid substrate with high mechanical strength for flexible and biocompatible organic resistive memory devices

artículo científico publicado en 2016

Tunable electrical memory characteristics using polyimide:polycyclic aromatic compound blends on flexible substrates

artículo científico publicado en 2013

Ultra metal ions and pH sensing characteristics of thermoresponsive luminescent electrospun nanofibers prepared from poly(HPBO-co-NIPAAm-co-SA)

Uniform Luminous Perovskite Nanofibers with Color-Tunability and Improved Stability Prepared by One-Step Core/Shell Electrospinning

scientific article published on 30 April 2018

Use of Myometrium as an Internal Reference for Endometrial and Cervical Cancer on Multiphase Contrast-Enhanced MRI.

artículo científico publicado en 2016

Using a single electrospun polymer nanofiber to enhance carrier mobility in organic field-effect transistors toward nonvolatile memory.

artículo científico publicado en 2014

Utilization of micelles formed from poly(ethylene glycol)-block-poly(epsilon-caprolactone) block copolymers as nanocarriers to enable hydrophobic red two-photon absorbing emitters for cells imaging.

artículo científico publicado en 2010

Very small photoluminescent gold nanoparticles for multimodality biomedical imaging ⬇️

artículo científico publicado el 30 de mayo de 2012

Well-defined star-shaped donor-acceptor conjugated molecules for organic resistive memory devices.

artículo científico publicado en 2015

n-Type Doped Conjugated Polymer for Nonvolatile Memory

artículo científico publicado en 2017

Lista de obras de Wen-Chang Chen

2D Cs2Pb(SCN)2Br2-based Photomemory Devices Showing a Photo-Induced Recovery Behavior and an Unusual Fully Optically-Driven Memory Behavior

A Novel Benzoxazole-Containing Poly(N-isopropylacrylamide) Copolymer as a Multifunctional Sensing Material

A cross-disciplinary overview of naturally derived materials for electrochemical energy storage

A poly(fluorene-thiophene) donor with a tethered phenanthro[9,10-d]imidazole acceptor for flexible nonvolatile flash resistive memory devices.

A silole copolymer containing a ladder-type heptacylic arene and naphthobisoxadiazole moieties for highly efficient polymer solar cells

A supramolecular approach on using poly(fluorenylstyrene)-block-poly(2-vinylpyridine):PCBM composite thin films for non-volatile memory device applications.

Advances and challenges of green materials for electronics and energy storage applications: from design to end-of-life recovery

Alcohol-Soluble Cross-Linked Poly( nBA) n- b-Poly(NVTri) m Block Copolymer and Its Applications in Organic Photovoltaic Cells for Improved Stability

Asymmetric Side-Chain Engineering of Isoindigo-Based Polymers for Improved Stretchability and Applications in Field-Effect Transistors

Backbone Engineering of Diketopyrrolopyrrole-Based Conjugated Polymers through Random Terpolymerization for Improved Mobility-Stretchability Property

Bio-Based Transparent Conductive Film Consisting of Polyethylene Furanoate and Silver Nanowires for Flexible Optoelectronic Devices

Carbohydrate-Based Block Copolymer Thin Films: Ultrafast Nano-Organization with 7 nm Resolution Using Microwave Energy

Conjugated donor-acceptor-acceptor (D-A-A) molecule for organic nonvolatile resistor memory

Conjugated fluorene based rod-coil block copolymers and their PCBM composites for resistive memory switching devices.

Control of thermoresponsive property of urea end-functionalized poly(N-isopropylacrylamide) based on the hydrogen bond-assisted self-assembly in water

Correlating Nanomorphology with Charge-Transport Anisotropy in Conjugated-Polymer Thin Films

Development of Block Copolymers with Poly(3-hexylthiophene) Segments as Compatibilizers in Non-Fullerene Organic Solar Cells

Diketopyrrolopyrrole-thiophene-based acceptor-donor-acceptor conjugated materials for high-performance field-effect transistors.

Donor-Acceptor Core-Shell Nanoparticles and Their Application in Non-Volatile Transistor Memory Devices

Donor-acceptor oligoimides for application in high-performance electrical memory devices

Effective interfacial layer to enhance efficiency of polymer solar cells via solution-processed fullerene-surfactants

Effects of chain architectures on the surface structures of conjugated rod-coil block copolymer brushes.

Efficient and UV-stable perovskite solar cells enabled by side chain-engineered polymeric hole-transporting layers

Electrochemical study on screen-printed carbon electrodes with modification by iron nanoparticles in Fe(CN)(6) (4-/3-) redox system.

Electrospun polymer nanofibers of P(NIPAAm- co -SA- co -FBPY): Preparation, structural control, metal ion sensing and thermoresponsive characteristics

Enhanced Charge Transport and Stability Conferred by Iron(III)-Coordination in a Conjugated Polymer Thin-Film Transistors

Enhanced Near-Infrared Photoresponse of Inverted Perovskite Solar Cells Through Rational Design of Bulk-Heterojunction Electron-Transporting Layers

Enhancement of irradiation effects on cancer cells by cross-linked dextran-coated iron oxide (CLIO) nanoparticles

Evaluation of structure–property relationships of solution-processible fullerene acceptors and their n-channel field-effect transistor performance

High Performance Nonvolatile Transistor Memories Utilizing Functional Polyimide-Based Supramolecular Electrets

High Performance Transparent Transistor Memory Devices Using Nano-Floating Gate of Polymer/ZnO Nanocomposites.

High-Efficiency Polymer Solar Cells Achieved by Doping Plasmonic Metallic Nanoparticles into Dual Charge Selecting Interfacial Layers to Enhance Light Trapping

High-Mobility Air-Stable Solution-Shear-Processed n-Channel Organic Transistors Based on Core-Chlorinated Naphthalene Diimides

High-Performance Air-Stable n-Type Organic Transistors Based on Core-Chlorinated Naphthalene Tetracarboxylic Diimides

High-Performance Nonvolatile Organic Photonic Transistor Memory Devices using Conjugated Rod-Coil Materials as a Floating Gate

High-Performance Nonvolatile Transistor Memories of Pentacence Using the Green Electrets of Sugar-based Block Copolymers and Their Supramolecules

High-k polymer-graphene oxide dielectrics for low-voltage flexible nonvolatile transistor memory devices.

High-performance nonvolatile organic transistor memory devices using the electrets of semiconducting blends.

Improved Charge Transport and Absorption Coefficient in Indacenodithieno[3,2-b]thiophene-based Ladder-Type Polymer Leading to Highly Efficient Polymer Solar Cells

Improving the Performance and Stability of Perovskite Light-Emitting Diodes by a Polymeric Nanothick Interlayer-Assisted Grain Control Process

Improving the characteristics of an organic nano floating gate memory by a self-assembled monolayer.

Influence of polymeric electrets on the performance of derived hybrid perovskite-based photo-memory devices

Intrinsically Stretchable Nanostructured Silver Electrodes for Realizing Efficient Strain Sensors and Stretchable Organic Photovoltaics

Low-temperature electrodeposited crystalline SnO2 as an efficient electron-transporting layer for conventional perovskite solar cells

Morphology and pH Sensing Characteristics of New Luminescent Electrospun Fibers Prepared from Poly(phenylquinoline)-block-Polystyrene/Polystyrene Blends

Multifunctional Electrospun Nanofibers Prepared from Poly((N-isopropylacrylamide)-co-(N-hydroxymethylacrylamide)) and Their Blends with 1,2-Diaminoanthraquinone for NO Gas Detection

Multilevel Photonic Transistor Memory Devices Using Conjugated/Insulated Polymer Blend Electrets

Multilevel nonvolatile flexible organic field-effect transistor memories employing polyimide electrets with different charge-transfer effects.

Nano-Micro Dimensional Structures of Fiber-Shaped Luminous Halide Perovskite Composites for Photonic and Optoelectronic Applications

Nanostructure- and Orientation- Controlled Resistive Memory Behaviors of Carbohydrate-block-Polystyrene with Different Molecular Weights Via Solvent Annealing

Network structures of polyhedral oligomeric silsesquioxane based nanocomposites: a Monte Carlo study.

Non-halogenated solvents for environmentally friendly processing of high-performance bulk-heterojunction polymer solar cells

Non-volatile memory devices based on polystyrene derivatives with electron-donating oligofluorene pendent moieties.

Non-volatile organic transistor memory devices using the poly(4-vinylpyridine)-based supramolecular electrets

Non-volatile transistor memory devices using charge storage cross-linked core-shell nanoparticles

Non-woven and aligned electrospun multicomponent luminescent polymer nanofibers: effects of aggregated morphology on the photophysical properties

Nonvolatile Perovskite-Based Photomemory with a Multilevel Memory Behavior.

Nonvolatile organic thin film transistor memory devices based on hybrid nanocomposites of semiconducting polymers: gold nanoparticles.

Oligosaccharide Carbohydrate Dielectrics toward High-Performance Non-volatile Transistor Memory Devices

One-pot synthesis of AuPt alloyed nanoparticles by intense x-ray irradiation

One-pot tuning of Au nucleation and growth: from nanoclusters to nanoparticles

Organic-Inorganic Nanocomposite Film for High-Performance Stretchable Resistive Memory Device

Poly[2,7-(9,9-dihexylfluorene)]-block-Poly(2-vinylpyridine) Rod-Coil Star-block Copolymers: Synthesis, Micellar Structures, and Photophysical Properties

RGB-Switchable Porous Electrospun Nanofiber Chemoprobe-Filter Prepared from Multifunctional Copolymers for Versatile Sensing of pH and Heavy Metals.

Realization of Intrinsically Stretchable Organic Solar Cells Enabled by Charge-Extraction Layer and Photoactive Material Engineering

S,N-Heteroacene-Based Copolymers for Highly Efficient Organic Field Effect Transistors and Organic Solar Cells: Critical Impact of Aromatic Subunits in Ladder π-System.

Single-crystal C60 needle/CuPc nanoparticle double floating-gate for low-voltage organic transistors based non-volatile memory devices

Solution-shear-processed quaterrylene diimide thin-film transistors prepared by pressure-assisted thermal cleavage of swallow tails.

Solvent Effects on Morphology and Electrical Properties of Poly(3-hexylthiophene) Electrospun Nanofibers

Stimuli-responsive conjugated rod-coil block copolymers: Synthesis, morphology, and applications

Stretchable Fluorescent Polyfluorene/Acrylonitrile Butadiene Rubber Blend Electrospun Fibers through Physical Interaction and Geometrical Confinement.

Stretchable Polymer Dielectrics for Low-Voltage-Driven Field-Effect Transistors.

Stretchable and Ambient Stable Perovskite/Polymer Luminous Hybrid Nanofibers of Multicolor Fiber Mats and Their White LED Applications

Study on Intrinsic Stretchability of Diketopyrrolopyrrole-based π-Conjugated Copolymers with Poly(acryl amide) Side-chains for Organic Field-effect Transistors

Supramolecular block copolymers: graphene oxide composites for memory device applications.

Syntheses of 4-Indolylquinoline Derivatives via Reductive Cyclization of Indolylnitrochalcone Derivatives by Fe/HCl.

Synthesis of Bicyclic Isoxazoles and Isoxazolines via Intramolecular Nitrile Oxide Cycloaddition

Synthesis of monodispersed polystyrene–silver core–shell particles and their application in the fabrication of stretchable large-scale anisotropic conductive films

Synthesis of multifunctional poly(1-pyrenemethyl methacrylate)-b-poly(N-isopropylacrylamide)-b-poly(N-methylolacrylamide)s and their electrospun nanofibers for metal ion sensory applications