Nonvolatile optically-erased colloidal memristors

Huebner, Christopher F.; Tsyalkovsky, Volodymyr; Bandera, Yuriy; Burdette, Mary K.; Shetzline, Jamie A.; Tonkin, Charles; Creager, Stephen E.; Foulger, Stephen H.

doi:10.1039/c4nr05167j

Cited by 11 publications

(12 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…While the absorbance and emission characteristics of the above polymers are similar, their profiles are quite different from C2, PNMA, and PUMA . Both the absorbance and photoluminescence profile of 10a,b , 11 , and 16 are greatly red‐shifted, and peak broadening is observed when compared to C2 , PNMA, and PUMA.…”

Section: Resultsmentioning

confidence: 93%

“…Supporting Information for details). Lengthening or oxygenating the n ‐alkyl chain and adding one or more biphenyl groups to the carbazole pendant group on the parent polymer were investigated . Structure–property relationships, such as glass transition temperature ( T g ), decomposition temperature, activation energy, electronic band gap, absorbance, and photoluminescence were studied to interpret the full effect of these manipulations when compared to the properties of C2 , poly(9‐(9 H ‐carbazol‐9‐yl)nonyl methacrylate) (PNMA, the unsubstituted version of 10a and 11 ), and poly(9‐(9 H ‐carbazol‐9‐yl)undecyl methacrylate) (PUMA, the unsubstituted version of 10b ) …”

Section: Resultsmentioning

confidence: 99%

“…LUMO could then be calculated through the equation Δ E = E LUMO ‐ E HOMO . The addition of the conjugated bonds by introducing the biphenyl substituents appears to affect the state of the electrons in the carbazole system by decreasing the band gap when compared to C2 . However, the addition of two biphenyl groups to the carbazole ( 11 ) moiety and the addition of oxygen into the side chain ( 16 ) does not appear to have a significant effect beyond the initial change observed when one biphenyl substituent was added to the carbazole moiety (10a,b) (cf.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Synthesis of n‐alkyl methacrylate polymers with pendant carbazole moieties and their derivatives

Bandera

McFarlane

Burdette

et al. 2018

J. Polym. Sci. Part A: Polym. Chem.

Self Cite

View full text Add to dashboard Cite

New methacrylate monomers with carbazole moieties as pendant groups were synthesized by multistep syntheses starting from carbazoles with biphenyl substituents in the aromatic ring. The corresponding polymers were prepared using a free‐radical polymerization. The novel polymers contain N‐alkylated carbazoles mono‐ or bi‐substituted with biphenyl groups in the aromatic ring. N‐alkyl chains in polymers vary by length and structure. All new polymers were synthesized to evaluate the structural changes in terms of their effect on the energy profile, thermal, dielectric, and photophysical properties when compared to the parent polymer poly(2‐(9H‐carbazol‐9‐yl)ethyl methacrylate). According to the obtained results, these compounds may be well suited for memory resistor devices. © 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2019, 57, 70–76

show abstract

Section: Resultsmentioning

confidence: 93%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis of n‐alkyl methacrylate polymers with pendant carbazole moieties and their derivatives

Bandera

McFarlane

Burdette

et al. 2018

J. Polym. Sci. Part A: Polym. Chem.

Self Cite

View full text Add to dashboard Cite

show abstract

“…6,7 However, a fully reversible latched optical switch exhibiting both an optical Set and optical Reset has not been reported. 8,9,10 In this work we report on such a device and use this to demonstrate a memristor with learning properties tunable by light. We show optical control of the synaptic potentiation and depression, optical switching between short and long term memory and optical modulation of the synaptic efficacy via spike timing dependent plasticity, which to the best of our knowledge has also not be been demonstrated in an optical memristor before.…”

Section: Page 1 Of 17 Nanoscalementioning

confidence: 99%

Reversible optical switching memristors with tunable STDP synaptic plasticity: a route to hierarchical control in artificial intelligent systems

et al. 2017

View full text Add to dashboard Cite

Optical control of memristors opens the route to new applications in optoelectronic switching and neuromorphic computing. Motivated by the need for reversible and latched optical switching we report on the development of a memristor with electronic properties tunable and switchable by wavelength and polarization specific light. The device consists of an optically active azobenzene polymer, poly(disperse red 1 acrylate), overlaying a forest of vertically aligned ZnO nanorods. Illumination induces trans-cis isomerization of the azobenzene molecules, which expands or contracts the polymer layer and alters the resistance of the off/on states, their ratio and retention time. The reversible optical effect enables dynamic control of a memristor's learning properties including control of synaptic potentiation and depression, optical switching between short-term and long-term memory and optical modulation of the synaptic efficacy via spike timing dependent plasticity. The work opens the route to the dynamic patterning of memristor networks both spatially and temporally by light, thus allowing the development of new optically reconfigurable neural networks and adaptive electronic circuits.

show abstract

“…Nanoparticle self‐assembly is emerging as a powerful tool to design and fabricate mesoscale assemblies and interfaces . For polymer‐based materials, they provide a unique pathway to generate complex structures and co‐assemblies under nonequilibrium processing conditions with macroscopic homogeneity and compositional flexibility.…”

Section: Introductionmentioning

confidence: 99%

Mixed Ionic–Electronic Conduction in Binary Polymer Nanoparticle Assemblies

Renna

Lenef

Bag

et al. 2017

Adv Materials Inter

View full text Add to dashboard Cite

transistors. [5] Polymer-based MIECs contain two principal components, one for electronic conduction and the other for ionic conduction. Each of these components should meet the molecular packing requirements for charge transport and both components should arrange in cocontinuous morphologies with percolation pathways for charge transport in three dimensions. Yet, achieving such structures relevant for MIECs has not been straightforward. At present, several different strategies are used to design and fabricate MIECs. They are: (1) mixing of conjugated polymers and polyelectrolytes [e.g., poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate)], [5,6,8,9] (2) imbibing ionic fluids in conjugated polymer films, [11] (3) incorporating ion conducting side chains on conjugated polymers, [12][13][14][15][16] (4) ion-doped [17][18][19][20] or oxidized [21] conjugated polymers, and (5) diblock copoly mer with ion conducting and electronic conducting polymers as the constituent blocks [e.g., poly(3-hexylthiophene)-bpoly(ethylene oxide) (P3HT-b-PEO)]. [2,3] However, these methods do not afford separate and systematic control over the morphology and properties of the ionic and electronic conducting phases while keeping the overall morphology constant. The central problem is the lack of a general approach to control the molecular packing and morphology in MIECs. We report here an approach, based on polymer nanoparticle selfassembly, to fabricate polymer-based MIECs. This approach provides a pathway to achieve tailored molecular order for each component on the nanoscale (<100 nm) and targeted assembly of the components on the mesoscale (>100 nm-100 µm). We demonstrate the efficacy of this approach for fabricating MIECs through binary nanoparticle assemblies of electronically conducting and Li-ion conducting polymer nanoparticles (see Figure 1a).Nanoparticle self-assembly is emerging as a powerful tool to design and fabricate mesoscale assemblies and interfaces. [22][23][24][25] For polymer-based materials, they provide a unique pathway to generate complex structures and co-assemblies under nonequilibrium processing conditions with macroscopic homogeneity and compositional flexibility. In this strategy, we first fabricate polymer components as nanoparticles, and then use them as building blocks for further assembly to create Polymer-based mixed ionic-electronic conductors (MIECs) are desired for both bulk and interfacial materials in next-generation energy storage and electronic devices. Polymer-based MIECs contain two principal components, one for electronic conduction and the other for ionic conduction. The central problem is the lack of a general approach to control the molecular packing and morphology of the constituent components that will afford the ability to easily tune transport properties. This study demonstrates the efficacy of a modular method based on polymer nanoparticle self-assembly to achieve MIECs with tunable conductivity. This work uses poly(3-hexylthiophene) nanoparticles as the electronic conductor and li...

show abstract

Nonvolatile optically-erased colloidal memristors

Cited by 11 publications

References 23 publications

Synthesis of n‐alkyl methacrylate polymers with pendant carbazole moieties and their derivatives

Synthesis of n‐alkyl methacrylate polymers with pendant carbazole moieties and their derivatives

Reversible optical switching memristors with tunable STDP synaptic plasticity: a route to hierarchical control in artificial intelligent systems

Mixed Ionic–Electronic Conduction in Binary Polymer Nanoparticle Assemblies

Contact Info

Product

Resources

About