Chemically Controlled Volatile and Nonvolatile Resistive Memory Characteristics of Novel Oxygen-Based Polymers

Abstract

Materials and SynthesisPoly(ethylene-alt-dibenzyl maleate) (PEM-Bz). PEM (200 mg, 1.59 mmol of anhydride moiety) was mixed with benzyl alcohol (0.821 ml, 7.93 mmol) in dry DMF (30 mL). EDC (912.1 mg, 4.76 mmol), DMAP (581.3 mg, 4.76 mmol), and triethylamine (TEA: 0.221 mL, 1.59 mmol) were then added to the mixture (Scheme 1). The mixture was stirred in room temperature for 72 h. The dry DMF was then removed from the reaction flask through evaporation and the remaining contents were dissolved with dichloromethane (CH2Cl2). The reaction mixture in CH2Cl2 was then precipitated into cold methanol (MeOH) to yield white powder. The cold precipitation step was repeated three times to yield the final product (466.4 mg). Yield: 90.7%. 1 H NMR (400 MHz, CDCl3): δ (ppm) 7.22 (br, aromatic), 4.91 (br, -OCH2-benzyl), 2.80-0.95 (m, -CH2-CH2-CH(COO-benzyl)-CH(COObenzyl)-). Mn,SEC = 168.0 kDa (DMF); Ð = 2.85. Poly(ethylene-alt-di(4-methylbenzyl) maleate) (PEM-BzMe). PEM-BzMe was synthesized from PEM (200 mg, 1.59 mmol of anhydride moiety) and 4-methylbenzyl alcohol (7.93 mmol) in the same manner as PEM-Bz was prepared above (Scheme 1). Yield: 67.4%. 1 H NMR (400

Embedding Azobenzol-Decorated Tetraphenylethylene into the Polymer Matrix to Implement a Ternary Memory Device with High Working Temperature/Humidity

“…During its aggregation in the polymer matrix upon bias voltage, AIC effect and the configuration change induced by high polarity of TPE-Azo will give rise to its multilevel memory. Furthermore, the insulated, thermally stable, and hydrophobic polymer, that is, poly­(ethylene- alt -maleic anhydride) (PEM), was used as the model matrix . Through the blending approach, , the large resonance additive (TPE-Azo) was incorporated into PEM to construct the TPE-Azo@PEM composite, which was used as an active layer to fabricate a ternary memory FTO/TPE-Azo@PEM/Ag device possessing three conductive states of “OFF”, “ON1”, and “ON2”.…”

Study of Electronic and Steric Effects of Different Substituents in Donor–Acceptor Molecules on Multilevel Organic Memory Data Storage Performance

“…Notably, the ON/OFF current ratio of OMe‐TBT based device is higher as compared to that of TBT, which could be ascribed to the strong charge affinity of OMe group as reported in the literature and thereby the boosted hole transport ability. [ 51 ] Therefore, by introducing different types of terminal moieties, the film morphology and trap depth of D–A molecules can be modulated simultaneously, thereby realizing multilevel electrical memory behavior with the lower threshold voltage and higher ON/OFF current ratio.…”

Newly Found Digital Memory Characteristics of Pyrrolidone‐ and Succinimide‐Based Polymers

“…Synthesis: PEP-EP, a polymer bearing 2-pyrrolidone moiety was prepared from PEM and EP by a postesterification reaction scheme, which is similar to that reported previously in the literature. [23] Under N 2 atmosphere, PEM (200 mg, 2.81 mmol) and EP (1.59 mL, 14.1 mmol) was added to 10 mL dry DMF, followed by stirring at room temperature for 6 h. To the solution, then TEA (0.392 ml, 2.813 mmol) was added and, thereafter, (EDC; 912.1 mg, 4.78 mmol) and DMAP (581.3 mg, 4.78 mmol) were added. The solution was stirred at room temperature for additional 5 days.…”

“…Based on the information data generated globally so far, new digital information of more than 175 zettabytes is predicted to be generated in 2025. [ 22,23 ] A series of polymers with and without 2‐pyrrolidone and succinimide moieties was synthesized, as illustrated in Figure a: poly(ethylene‐ alt ‐di(2‐pyrrolidone‐5‐ethyl) maleate) (PEM‐EP), poly(ethylene‐ alt ‐di(acetamidoethyl) maleate) (PEM‐EA), poly(ethylene‐ alt ‐di(succinimido‐ N ‐ethyl) maleate) (PEM‐ES), and poly(ethylene‐ alt ‐di(3‐oxo‐1‐butyl) maleate) (PEM‐EB). PVP was included as an additional polymer containing 2‐pyrrolidone (Figure 1b).…”