Chemical constituents of Aristolochia manshuriensis

Kang, Da-Li; Zhang, Hongli; Xiao-gen, Wang; Liu, Hao; Wang, Chong

doi:10.1007/s10600-011-9794-7

Cited by 16 publications

(23 citation statements)

References 4 publications

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“…The structural changes of these samples against the changes of humidity or processes of water condensation/evaporation can, of course, be studied by in situ observations in the ESEM chamber. [119][120][121][122][123][124] The pressure in chamber increases from 706.6 to 879.9 Pa and the water vapor pressure of water is 813.5 Pa at this temperature. The nanogrooves (purple arrowheads) are initially filled by nucleated water.…”

Section: Phase Transitions Of Watermentioning

confidence: 99%

“…The thickness of film increased from an initial value of 2.9 to 18.6 µm as the RH increased form 0% to 100%. [120] Hiranuma et al also determined the hygroscopic properties of agricultural aerosols in ESEM, which was used to acquire not only a qualitative description of the shape and morphology but also the detailed images of samples as a function of RH. They found that most of the agricultural particles did not take up significant amounts of water when exposed up to 96% RH.…”

Section: Wwwadvancedsciencenewscommentioning

confidence: 99%

“…Reproduced with permission. [120] Copyright 2007, Springer Nature. work demonstrates that ESEM has a potential application for in situ fluidic experiments at the nanoscale, by using the ability to see through the nanotube walls, and to study the liquid flow, condensation, and evaporation inside these nanotubes.…”

Section: Wwwadvancedsciencenewscommentioning

confidence: 99%

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Applications of ESEM on Materials Science: Recent Updates and a Look Forward

et al. 2019

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The microscopic understanding of materials relies on the development of microscopy. Historically, the technological evolution from optical microscopes to electron microscopes has directly stimulated many discoveries of new physical and chemical fundamentals as well as advanced materials. Scanning electron microscopy (SEM) is, undoubtedly, the most widely used tool for microscopic characterization in modern materials science. Especially, the incorporation of a gas pressure around the sample area of conventional SEM, i.e., the environmental scanning electron microscope (ESEM), has opened new possibilities in observing samples in their natural states, leading to unprecedented chances for studying the details of biological, organic, and hydrated samples. What is more, in recent years, in situ ESEM studies concerning materials change and chemical reactions have played a more important role in the field of materials science. Herein, the recent applications of ESEM in materials science are comprehensively reviewed, in terms of common static observations for various materials and in situ investigations of dynamic processes in controlled experimental environments. Moreover, the problems concerning state‐of‐the‐art ESEM experiments are discussed, as well as possible solutions. Looking forward, the rapid developments on instrumentation and fundamental science of ESEM can bring a clear vision of materials in the near future.

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Section: Phase Transitions Of Watermentioning

confidence: 99%

Section: Wwwadvancedsciencenewscommentioning

confidence: 99%

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Applications of ESEM on Materials Science: Recent Updates and a Look Forward

et al. 2019

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“…The formation of self-assembled patterns in thin film can also be combined with hybridization methods, [10] thus converting the BCP patterns into functional structured surfaces such as bit-patterned media, [11][12][13] field effect transistors, [14,15] optical metamaterials, [16][17][18] or photonic structures. [19][20][21] This can be performed by using the nanostructured BCP scaffold as a template for a subsequent deposition of functional materials (via sequential infiltration synthesis, [22,23] electro-deposition or replication, [17,[24][25][26] lift-off process, [27,28] aqueous metal reduction, [29,30] inclusion of nanoparticles, [31,32] sol-gel process, [33] etc.). Alternatively, coassembly strategies can be employed in which the BCP self-assembly process acts as a structure directing agent for nano-objects [34][35][36][37] or metal-oxide precursors.…”

Section: Introductionmentioning

confidence: 99%

Non‐Native Block Copolymer Thin Film Nanostructures Derived from Iterative Self‐Assembly Processes

Demazy

Cummins

Aissou

et al. 2019

Adv Materials Inter

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Nanostructured block copolymer (BCP) thin films constitute an elegant tool to generate complex periodic patterns with periodicities ranging from a few nanometers to hundreds of nanometers. Such well‐organized nanostructures are foreseen to enable next‐generation nanofabrication research with potent applications in the design of functional materials in biology, optics or microelectronics. This valuable platform is, however, limited by the geometric features attainable from diblock copolymer architectures considering the thermodynamic driving force leaning toward the formation of structures minimizing the interface between the blocks. Therefore, strategies to enrich the variety of structures obtained by BCP self‐assembly processes are gaining momentum and this progress report reviews the opportunities inherent to iterative BCP self‐assembly by considering the emerging strategies for the generation of “non‐native” morphologies.

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“…[7][8][9] Based on the tremendous past knowledge, block copolymer-based structures have been used, or are expected, for applications to various nano-materials, e. g., patterned substrates, [10][11][12] and optical functional materials. [13][14][15] Such micro-phase separated structures composed of block copolymers become disordered gradually with an increase in temperatures, which is related to the dependency of χ on the temperature; χ is roughly expressed χ = A + B/T, where A and B is regarded as enthalpic term and entropic term, respectively. [16,17] Since B is positive in most case, χ decreases with an increase in temperatures.…”

mentioning

confidence: 99%

Quick and Efficient Thermal Stability Enhancement of Micro‐Phase Separated Structure Formed from ABA Triblock Copolymers by Photo Cross‐Linking Approach

et al. 2020

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We here report quick and efficient enhancement of the thermal stability of triblock copolymer‐based bulk morphologies by utilizing photo cross‐linking, which aims for widening the application range of block copolymer‐based materials. First, we synthesized ABA triblock copolymer bearing photo cross‐linkable groups (i. e., benzophenone groups) in the end blocks via two step atom transfer radical polymerizations (ATRP) and subsequent esterification reaction. UV‐light was irradiated for the annealed bulk films at room temperature, and the photo cross‐linking completely progressed within several minutes. Small angle X‐ray scattering (SAXS) and the model fitting analysis revealed that the original cylinder morphology of the neat sample was nicely preserved after the photo cross‐linking, which enables investigation of intrinsic effects of domain cross‐linking. The temperature ramp SAXS measurements demonstrated the photo cross‐linked cylinder structure remained up to the temperature (∼320 °C) much higher than the disordering temperature (∼240 °C) of the neat uncross‐linked structure.

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Chemical constituents of Aristolochia manshuriensis

Cited by 16 publications

References 4 publications

Applications of ESEM on Materials Science: Recent Updates and a Look Forward

Applications of ESEM on Materials Science: Recent Updates and a Look Forward

Non‐Native Block Copolymer Thin Film Nanostructures Derived from Iterative Self‐Assembly Processes

Quick and Efficient Thermal Stability Enhancement of Micro‐Phase Separated Structure Formed from ABA Triblock Copolymers by Photo Cross‐Linking Approach

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