Electrically permanent memory characteristics of an ionic conjugated polymer

2012 ◽  
Vol 3 (8) ◽  
pp. 2028 ◽  
Author(s):  
Yong-Gi Ko ◽  
Wonsang Kwon ◽  
Dong Min Kim ◽  
Kyungtae Kim ◽  
Yeong-Soon Gal ◽  
...  
Keyword(s):  
Conjugated Polymer ◽  
Permanent Memory ◽  
Memory Characteristics

Programmable Digital Memory Characteristics of Nanoscale Thin Films of a Fully Conjugated Polymer

2009 ◽  
Vol 113 (9) ◽  
pp. 3855-3861 ◽  
Author(s):  
Taek Joon Lee ◽  
Samdae Park ◽  
Suk Gyu Hahm ◽  
Dong Min Kim ◽  
Kyungtae Kim ◽  
...  
Keyword(s):  
Thin Films ◽  
Conjugated Polymer ◽  
Digital Memory ◽  
Memory Characteristics

Electrical Memory Characteristics of a Nondoped π-Conjugated Polymer Bearing Carbazole Moieties

2010 ◽  
Vol 114 (32) ◽  
pp. 10294-10301 ◽  
Author(s):  
Samdae Park ◽  
Taek Joon Lee ◽  
Dong Min Kim ◽  
Jin Chul Kim ◽  
Kyungtae Kim ◽  
...  
Keyword(s):  
Conjugated Polymer ◽  
Polymer Bearing ◽  
Memory Characteristics

Soft ionic liquid based resistive memory characteristics in a two terminal discrete polydimethylsiloxane cylindrical microchannel

2020 ◽  
Vol 8 (38) ◽  
pp. 13368-13374
Author(s):  
Muhammad Umair Khan ◽  
Gul Hassan ◽  
Jinho Bae
Keyword(s):  
Ionic Liquid ◽  
Acrylic Acid ◽  
Sodium Hydroxide ◽  
Sodium Salt ◽  
Resistive Memory ◽  
Cylindrical Microchannel ◽  
Memory Characteristics ◽  
Poly Acrylic Acid

This paper proposes a novel soft ionic liquid (IL) electrically functional device that displays resistive memory characteristics using poly(acrylic acid) partial sodium salt (PAA-Na+:H2O) solution gel and sodium hydroxide (NaOH) in a thin polydimethylsiloxane (PDMS) cylindrical microchannel.

Fantasie und Wirklichkeit - Erinnerungsqualitäten von erlebten und erfundenen Geschichten

2004 ◽  
Vol 212 (3) ◽  
pp. 135-151 ◽  
Author(s):  
Siegfried Ludwig Sporer ◽  
Beate Küpper
Keyword(s):  
Memory Characteristics

Zusammenfassung. Im Zentrum dieser Untersuchung steht die Frage, wodurch wir tatsächlich Erlebtes von lediglich Vorgestelltem, durch Gedanken oder unsere Fantasie Geschaffenem, unterscheiden können. Diese und ähnliche Fragestellungen werden im Rahmen des Realitätsüberwachungsansatzes untersucht, allerdings mit relativ einfachen Handlungssequenzen. Ziel dieser Untersuchung war, diesen Ansatz auf komplexere autobiografische Erlebnisse auszudehnen und seine Brauchbarkeit bei der Diskrimination von erlebten vs. erfundenen Erlebnissen zu überprüfen. Wir ließen 100 Studierende, Schüler und Auszubildende innerhalb einer Woche je eine auf einem tatsächlichen, “besonderen“ Erlebnis beruhende und eine frei erfundene Geschichte - in ausbalancierter Reihenfolge - niederschreiben. Im Anschluss daran sollten die Verfasser die Geschichten anhand des Selbstbeurteilungsbogens von Erinnerungsqualitäten (SBEQ) - einer adaptierten Fassung von Johnson, Foley, Suengas und Raye’s (1988) Memory Characteristics Questionnaire - einschätzen. Die Ratings wurden getrennt für erlebte und erfundene Geschichten Faktorenanalysen unterzogen. Auf Grund theoretischer Vorüberlegungen und dieser Faktorenanalysen wurden acht Skalen von Erinnerungsqualitäten gebildet, die sich als Klarheit und Lebendigkeit, Sensorische Informationen, Räumlichkeit, Zeitangaben, Emotionen und Gefühle, Rekonstruierbarkeit, Realitätsnähe und Kognitive Operationen interpretieren lassen. Eine multivariate Varianzanalyse mit Wahrheitsstatus, Vorbereitung der Erzählung und Gechlecht der TeilnehmerInnen diskriminierte hochsignifikant zwischen erlebten und erfundenen Geschichten auf 6 der 8 Skalen. Die Zeit zur Vorbereitung der Erzählung hatte nur bei 2 Skalen eine Bedeutung. Die Ergebnisse werden in die theoretische Diskussion um Realitätsüberwachungsprozesse eingebettet.

Scanning-tunneling spectroscopy on conjugated polymer films

2003 ◽  
Vol 771 ◽  
Author(s):  
M. Kemerink ◽  
S.F. Alvarado ◽  
P.M. Koenraad ◽  
R.A.J. Janssen ◽  
H.W.M. Salemink ◽  
...  
Keyword(s):  
Polymer Films ◽  
Conjugated Polymer ◽  
Three Dimensional ◽  
Field Enhancement ◽  
Direct Consequence ◽  
Scanning Tunneling Spectroscopy ◽  
Tunneling Spectroscopy ◽  
Band Alignment ◽  
Scanning Tunneling ◽  
Order Of Magnitude

AbstractScanning-tunneling spectroscopy experiments have been performed on conjugated polymer films and have been compared to a three-dimensional numerical model for charge injection and transport. It is found that field enhancement near the tip apex leads to significant changes in the injected current, which can amount to more than an order of magnitude, and can even change the polarity of the dominant charge carrier. As a direct consequence, the single-particle band gap and band alignment of the organic material can be directly obtained from tip height-voltage (z-V) curves, provided that the tip has a sufficiently sharp apex.

Optical and Electrical Properties of Organic Conducting Polymers

2014 ◽  
Vol 8 (1) ◽  
pp. 1457-1463
Author(s):  
Salah Abdulla Hasoon
Keyword(s):  
Electrical Properties ◽  
Conjugated Polymer ◽  
Polymeric Materials ◽  
Quantum Mechanical ◽  
Optical And Electrical Properties ◽  
Electrically Conducting ◽  
Temperature Ranges ◽  
Lithium Tetrafluoroborate ◽  
Absorbance Peak ◽  
Polymerization Method

Novel electrically conducting polymeric materials are prepared in this work. Polythiophene (PT) and poly (3-Methelthiophene) (P3MT) films were prepared by electro-polymerization method using cyclic voltammetry in acetonitrile as a solvent and lithium tetrafluoroborate as the electrolyte on a gold electrode. Electrical properties of P3MT have been examined in different environments using UV-Vis absorption spectroscopy and quantum mechanical ab initio calculations, The observed absorption peaks at 314 and 415 nm, were attributed to the n-π* and π-π* transitions, respectively in the conjugated polymer chain, in contrast, the observed absorbance peak at 649 nm, is responsible for electric conduction. The temperature dependence of the conductivity can be fitted to the Arrhenius and the VTF equations in different temperature ranges.

Dissolution and Performing Homogeneous Photocatalysis of Polymeric Carbon Nitride

2018 ◽  
Author(s):  
Chaofeng Huang ◽  
Jing Wen ◽  
Yanfei Shen ◽  
Fei He ◽  
Li Mi ◽  
...  
Keyword(s):  
Conjugated Polymer ◽  
Carbon Nitride ◽  
Heterogeneous Catalysts ◽  
Methane Sulfonic Acid ◽  
Environment Friendly ◽  
The Poor ◽  
Catalytic Sites ◽  
Homogeneous Photocatalysis ◽  
Polymeric Carbon ◽  
First Time

<a></a><a>As a metal-free conjugated polymer, carbon nitride (CN) has attracted tremendous attention as heterogeneous (photo)catalysts. </a><a></a><a>By following prototype of enzymes, making all catalytic sites of accessible via homogeneous reactions is a promising approach toward maximizing CN activity, but hindered due to </a><a></a><a>the poor insolubility of CN</a>. Herein, we report the dissolution of CN in environment-friendly methane sulfonic acid and the homogeneous photocatalysis driven by CN for the first time with the activity boosted up to 10-times, comparing to the heterogeneous counterparts. Moreover, facile recycling and reusability, the <a>hallmark</a> of heterogeneous catalysts, were kept for the homogeneous CN photocatalyst via reversible precipitation using poor solvents. It opens new vista of CN in homogeneous catalysis and offers a successful example of polymeric catalysts in bridging gaps of homo/heterogeneous catalysis.

Endgroup and Sidechain Functionalization of Surface-Initiated ROMP Thin Films: Progress Towards ROMP-Based Molecular Wires

2018 ◽  
Author(s):  
Nicholas Marshall
Keyword(s):  
Thin Films ◽  
Contact Angle ◽  
Cyclic Voltammetry ◽  
Polymer Films ◽  
Conjugated Polymer ◽  
Ring Opening ◽  
Molecular Wires ◽  
Metathesis Polymerization ◽  
Cross Metathesis ◽  
Active Ester

A set of experiments in surface-initiated ring-opening metathesis polymerization, including end-functionalization of growing brushes and contact angle/cyclic voltammetry measurements. We report preparation and CV of two different conjugated polymer films, and several endgroup and sidechain functionalization experiments using cross-metathesis and active ester substitution.<br>

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