Role of point defects in hybrid phase TiO<sub>2</sub> for resistive random-access memory (RRAM)

Shamim, Tariq; Abbas, Adil; Qazi, Hummad Habib; Aziz, Muhammad Hammad; Shah, Matiullah; Ahmed, A. A.; Idrees, Muhammad

doi:10.1088/2053-1591/ab17b5

Cited by 28 publications

(39 citation statements)

References 25 publications

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“…The chemistry of desired synthesis acquired pH should approach 3 or less. 28 The purely acidic nature of solution promotes the homogeneous growth of crystalline tetragonal TiO 2 -LPE-based thin films. Moreover, the presence of HCl plays a vital role toward defect chemistry of TiO 2 -LPE-based thin films to control the oxidation state of Ti 4+ .…”

Section: Resultsmentioning

confidence: 99%

“…The acidic media govern the conversion of Ti 4+ into Ti 2+ at high pressure and excessive temperature during chemical reactions in an autoclave. 28 …”

Section: Resultsmentioning

confidence: 99%

“…At that moment, the titanium hydroxide forms a complex when reacting with water, which can be controlled in an acidic medium. 28 The complete procedure is illustrated in the following equations.…”

Section: Resultsmentioning

confidence: 99%

“…Radiative transfer of mobile electrons may be caught at low bulk close to the valence band during electron trapping phenomena. 28 Consequently, the electron being caught in the trapped state is bound to a structural defect that may be interstitial (Ti +3 and Ti +4 ). The trapped electron peaks lie in the 590–700 nm range corresponding to the red spectrum.…”

Section: Resultsmentioning

confidence: 99%

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Biomaterial-Induced Stable Resistive Switching Mechanism in TiO₂ Thin Films: The Role of Active Interstitial Sites/Ions in Minimum Current Leakage and Superior Bioactivity

et al. 2020

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Leakage of current in oxide layers is the main issue for higher speed and denser resistive random-access memory. Defect engineering played a substantial role in meeting this challenge by doping or producing controlled interstitial defects or active sites. These controlled active sites enabled memory cells to form a stable and reproducible conduction filament following an electrochemical metallization model. In this study, a defect-abundant lime peel extract (LPE)-mediated anatase TiO 2 thin film was fabricated using a simple hydrothermal route. The detailed structural and morphological analysis of the bioactive anatase TiO 2 -LPE thin film reveals the homogeneous growth of TiO 2 flowers and distinct features in terms of controlled defects as compared to simple anatase TiO 2 . These interstitial defects (Ti +3 and Ti +4 ) behave as active sites for cation migrations along highly conductive K 1+ ions because of the mediation of LPE. The defect-free surface reveals slight surface roughness (4.8 nm) that successfully minimizes leakage of current. The strategy enabled a reliable conductive bridge filament, which can replicate with no more electric degradation. The Ag/TiO 2 -LPE/FTO-based memory cell demonstrates reproducible bipolar resistive switching along with a high ON/OFF ratio (>10 5 ), excellent endurance (1.5 × 10 3 cycles), and long-term retention (10 5 s) without any electrical degradation. Furthermore, green-synthesized TiO 2 -LPE nanoparticles have shown superior antibacterial activity as compared to other green syntheses of different plants or fruits against the toxic microorganisms present in inorganic media.

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Section: Resultsmentioning

confidence: 99%

“…The acidic media govern the conversion of Ti 4+ into Ti 2+ at high pressure and excessive temperature during chemical reactions in an autoclave. 28 …”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Biomaterial-Induced Stable Resistive Switching Mechanism in TiO₂ Thin Films: The Role of Active Interstitial Sites/Ions in Minimum Current Leakage and Superior Bioactivity

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“…This is defined as heterogeneous reactions in aqueous media under high pressure and temperature sufficient to dissolve and recrystallize materials that are insoluble in water under normal conditions (Byrappa and Yoshimura, 2001 ). Various metal alkoxides (Ti(OR) 4 , R = C 2 H 5 , i-C 3 H 7 , C 4 H 9 ) or TiCl 4 have been used as precursors (Oh et al, 2009 ; Zhang et al, 2011 ; Senthilkumar et al, 2013 ; Dongale et al, 2014 ; Irshad et al, 2019 ). In this process, temperatures up to 230°C and high pressures (around 200 bar) facilitate the formation of a crystalline product at relatively low temperatures (Dalod et al, 2017 ).…”

Section: Synthesis and Fabricationmentioning

confidence: 99%

Memristive TiO2: Synthesis, Technologies, and Applications

et al. 2020

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Titanium dioxide (TiO 2 ) is one of the most widely used materials in resistive switching applications, including random-access memory, neuromorphic computing, biohybrid interfaces, and sensors. Most of these applications are still at an early stage of development and have technological challenges and a lack of fundamental comprehension. Furthermore, the functional memristive properties of TiO 2 thin films are heavily dependent on their processing methods, including the synthesis, fabrication, and post-fabrication treatment. Here, we outline and summarize the key milestone achievements, recent advances, and challenges related to the synthesis, technology, and applications of memristive TiO 2 . Following a brief introduction, we provide an overview of the major areas of application of TiO 2 -based memristive devices and discuss their synthesis, fabrication, and post-fabrication processing, as well as their functional properties.

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Recent Advances in Multifunctional Photothermal Materials for Solar‐Driven Steam and Energy Generation

et al. 2023

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Solar‐driven evaporation technology is rejuvenated by multifunctional photothermal materials into complimentary energy conversion applications. These multifunctional materials endow broadband solar absorptions, chemical/physical stability, porous, and active sites for in ‐situ photodegradation with exceptional solar‐to‐vapor conversion efficiencies. The structural configuration of evaporation structures is significantly improved by effective thermal management and salt‐resistant water channels with balanced relation between evaporation flux and water intake. These attributes lead this technology to higher evaporation rates and complimentary applications such as waste heat recovery to thermoelectricity, salt collection from seawater, and micro‐organism disinfection from wastewater. This review comprehensively reports the recent advances in state‐of‐the‐art multifunctional materials, novel evaporation designs with significant structural optimization, and their small‐scale prototypes. The current challenges, origins, and possible solutions are provided. This systematic review inspires the nanoresearch community to push forward solar‐driven evaporation technology with superb complimentary energy conversion applications.

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Role of point defects in hybrid phase TiO₂ for resistive random-access memory (RRAM)

Cited by 28 publications

References 25 publications

Biomaterial-Induced Stable Resistive Switching Mechanism in TiO₂ Thin Films: The Role of Active Interstitial Sites/Ions in Minimum Current Leakage and Superior Bioactivity

Biomaterial-Induced Stable Resistive Switching Mechanism in TiO₂ Thin Films: The Role of Active Interstitial Sites/Ions in Minimum Current Leakage and Superior Bioactivity

Memristive TiO2: Synthesis, Technologies, and Applications

Recent Advances in Multifunctional Photothermal Materials for Solar‐Driven Steam and Energy Generation

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Role of point defects in hybrid phase TiO2 for resistive random-access memory (RRAM)

Cited by 28 publications

References 25 publications

Biomaterial-Induced Stable Resistive Switching Mechanism in TiO2 Thin Films: The Role of Active Interstitial Sites/Ions in Minimum Current Leakage and Superior Bioactivity

Biomaterial-Induced Stable Resistive Switching Mechanism in TiO2 Thin Films: The Role of Active Interstitial Sites/Ions in Minimum Current Leakage and Superior Bioactivity

Memristive TiO2: Synthesis, Technologies, and Applications

Recent Advances in Multifunctional Photothermal Materials for Solar‐Driven Steam and Energy Generation

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Product

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Role of point defects in hybrid phase TiO₂ for resistive random-access memory (RRAM)

Biomaterial-Induced Stable Resistive Switching Mechanism in TiO₂ Thin Films: The Role of Active Interstitial Sites/Ions in Minimum Current Leakage and Superior Bioactivity

Biomaterial-Induced Stable Resistive Switching Mechanism in TiO₂ Thin Films: The Role of Active Interstitial Sites/Ions in Minimum Current Leakage and Superior Bioactivity