Nanostructural Anisotropy Underlies Anisotropic Electrical Bistability

Pillai, Pramod P.; Pacławski, K.; Kim, Jiwon; Grzybowski, Bartosz A.

doi:10.1002/adma.201202915

Cited by 8 publications

(6 citation statements)

References 39 publications

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“…In general, anisotropic nanostructures exhibit superior plasmonic properties over spherical nanomaterials because of their unique shape-dependent optoelectronic properties such as a high molar extinction coefficient, unidirectional charge transport, and edge effects . In the present work, an array of highly configurable one-dimensional AuNRs was fabricated on a glass slide with the help of the template-mediated electrodeposition technique (Figures and S1, Section 1 in the Supporting Information). , Briefly, an array of AuNRs was electrochemically grown in an anodic aluminum oxide (AAO) template having a silver backing layer (∼200 nm thick), followed by the etching of the template with a 3 M sodium hydroxide solution. The AuNRs in the array had a diameter of ∼75 nm, and the length was varied by controlling the electrodeposition time (280–350 s; Figures a–d, S2, and S3).…”

Section: Resultsmentioning

confidence: 99%

Insights into the Utilization and Quantification of Thermoplasmonic Properties in Gold Nanorod Arrays

et al. 2022

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Doing chemistry with plasmons is rewarding but is often challenged by the competition between the intriguing relaxation processes in plasmonic materials. One of the currently debated and prominent examples of this is the interference of the thermalization process in bringing out different physicochemical transformations. We present here insights into the utilization and quantification of thermoplasmonic properties in configurable arrays of gold nanorods (AuNRs), which will help in accomplishing the desired outcome from the thermalization process. The plasmonic heat generated in AuNR arrays is used to perform versatile and useful photothermal processes, such as polymerization, solar-vapor generation, Diels−Alder reaction, and crystal-to-crystal transformation. The unprecedented use of thermochromism in quantifying the thermalization process shows that the surface of AuNR arrays can heat up to ∼250 °C within ∼15 min of irradiation, which is independently validated with standard infrared-based thermometric imaging studies. The plasmonic heat reported by the thermochromic studies is the lower limit corresponding to the phase change temperature of the thermochromic molecule, and the actual surface temperature of bundled AuNR arrays could be higher. The choice of reaction conditions is crucial for the effective utilization as well as dissipation of thermoplasmonic heat. The maximum impact of surface temperature was observed when substrates were adsorbed onto the AuNR arrays, whereas the influence of thermoplasmonic heat was minimum when the experiments were performed in a solution state. The insights provided here will have far-reaching implications in the emerging area of plasmonically powered processes, especially in plasmonic photocatalysis.

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Section: Resultsmentioning

confidence: 99%

Insights into the Utilization and Quantification of Thermoplasmonic Properties in Gold Nanorod Arrays

et al. 2022

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“…It is not excluded that the C*ÁC base mispair can be used in modern biomolecular electronics for the creation on its basis of the nanostructural bistable elements which are managed by the external electric field. 94…”

Section: Discussionmentioning

confidence: 99%

Atomistic nature of the DPT tautomerisation of the biologically important C·C* DNA base mispair containing amino and imino tautomers of cytosine: a QM and QTAIM approach

Brovarets’

Hovorun

2013

Phys. Chem. Chem. Phys.

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A theoretical study of tautomerisation of the biologically important cytosine·cytosine* (C·C*) DNA mismatch with a propeller-like structure (|C4N3N3C4| = 32.4°; C1 symmetry) and cis-oriented N1H glycosidic bonds, formed by the amino and imino tautomers of the C nucleobase, via the asynchronous concerted double proton transfer (DPT) along two H-bonds through the transition state (TSC·C*↔C*·C) (|C4N3N3C4| = 48.5°; C1 symmetry) into the C*·C mispair was carried out for the first time. It was established that the C·C*/C*·C DNA base mispair is associated by the antiparallel N4H···N4 (6.66 kcal mol(-1)), N3H···N3 (6.47 kcal mol(-1)) H-bonds and the O2···O2 van der Waals (vdW) contact (0.33 kcal mol(-1)), while the zwitterionic TSC·C*↔C*·C is stabilized by the parallel N4(+)H···N4(-) (13.55 kcal mol(-1)), N3(+)H···N3(-) (13.20 kcal mol(-1)) H-bonds and the O2(+)···O2(-) vdW contact (0.60 kcal mol(-1)). It was shown that the C·C* ↔ C*·C tautomerisation via the DPT is assisted by the O2···O2 vdW contact, that in contrast to the two others N4H···N4 and N3H···N3 H-bonds exists along the entire intrinsic reaction coordinate (IRC) range. The positive values of the Grunenberg's compliance constants (30.919 and 21.384 Å mdyn(-1) for C·C*/C*·C and TSC·C*↔C*·C, respectively) indicate that the O2···O2 vdW contact is a stabilizing closed-shell interaction. It was found that the middle N3H···N3 H-bond is anti-cooperative with the upper N4H···N4 H-bond and cooperative with the lower O2···O2 vdW contact. The 9 key points, which can be considered as electron-topological "fingerprints" of the asynchronous concerted C·C* ↔ C*·C tautomerisation process via the DPT were revealed along the IRC and examined in detail. It was shown that the C·C*/C*·C base mispair is a thermodynamically and dynamically stable structure. Its lifetime is equal to 1.53 × 10(-7) s at the MP2/cc-pVQZ//B3LYP/6-311++G(d,p) level of theory in vacuum. All 6 low-frequency intermolecular vibrations are able to develop during this time span.

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“…However, despite the relevance of this to numerous applications, no systematic analysis of the meso-scale development of this bundle association has yet been carried out [82,287]. Herein, we would like to address how the trapping mechanism already presented in Section 4.2.1 in connection with the tilt angle of the nanocolumns may also account for the formation of bundles.…”

Section: Surface Area Roughness and Bundling Association Of Nanocolumentioning

confidence: 97%

Perspectives on oblique angle deposition of thin films: From fundamentals to devices

Barranco

Borrás

González‐Elipe

et al. 2016

Progress in Materials Science

581

426

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a b s t r a c tThe oblique angle configuration has emerged as an invaluable tool for the deposition of nanostructured thin films. This review develops an up to date description of its principles, including the atomistic mechanisms governing film growth and nanostructuration possibilities, as well as a comprehensive description of the applications benefiting from its incorporation in actual devices. In contrast with other reviews on the subject, the electron beam assisted evaporation technique is analyzed along with other methods operating at oblique angles, including, among others, magnetron sputtering and pulsed laser or ion beam-assisted deposition techniques. To account for the existing differences between deposition in vacuum or in the presence of a plasma, mechanistic simulations are critically revised, discussing well-established paradigms such as the tangent or cosine rules, and proposing new models that explain the growth of tilted porous nanostructures. In the second part, we present an extensive description of applications wherein oblique-angle-deposited thin films are of relevance. From there, we proceed by considering the requirements of a large number of functional devices in which these films are currently being utilized (e.g., solar cells, Li batteries, electrochromic glasses, biomaterials, sensors, etc.), and subsequently describe how and why these nanostructured materials meet with these needs.

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Nanostructural Anisotropy Underlies Anisotropic Electrical Bistability

Cited by 8 publications

References 39 publications

Insights into the Utilization and Quantification of Thermoplasmonic Properties in Gold Nanorod Arrays

Insights into the Utilization and Quantification of Thermoplasmonic Properties in Gold Nanorod Arrays

Atomistic nature of the DPT tautomerisation of the biologically important C·C* DNA base mispair containing amino and imino tautomers of cytosine: a QM and QTAIM approach

Perspectives on oblique angle deposition of thin films: From fundamentals to devices

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