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Manipulating Vertical Phase Separation Enables Pseudoplanar Heterojunction Organic Solar Cells Over 19% Efficiency via Ternary Polymerization

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ADVANCED MATERIALS 2024年第5期36卷 2308909-2308909页

作者： He, Dan Zhou, Jixiang Zhu, Yufan Li, Yawen Wang, Ke Li, Jie Zhang, Jianqi Li, Bao Lin, Yuze He, Yuehui Wang, Chunru Zhao, Fuwen Cent South Univ State Key Lab Powder Met Changsha 410083 Peoples R China Chinese Acad Sci Beijing Natl Lab Mol Sci CAS Key Lab Organ Solids Inst Chem Beijing 100190 Peoples R China Chinese Acad Sci Inst Chem Lab Mol Nanostruct & Nanotechnol Beijing 100190 Peoples R China Univ Chinese Acad Sci Beijing 100190 Peoples R China CAS Ctr Excellence Nanosci Natl Ctr Nanosci & Technol CAS Key Lab Nanosyst & Hierarch Fabricat Beijing 100190 Peoples R China Henan Normal Univ Sch Chem & Chem Engn Xinxiang 453007 Peoples R China

Controlling vertical phase separation of the active layer to enable efficient exciton dissociation and charge carrier transport is crucial to boost power conversion efficiencies (PCEs) of pseudoplanar heterojunction (PPHJ) organic solar cells (OSCs). However, how to optimize the vertical phase separation of PPHJ OSCs via molecule design is rarely reported yet. Herein, ternary polymerization strategy is employed to develop a series of polymer donors, DL1-DL4, and regulate their solubility, molecular aggregation, molecular orientation, and miscibility, thus efficiently manipulating vertical phase separation in PPHJ OSCs. Among them, DL1 not only has enhanced solubility, inhibited molecular aggregation and partial edge-on orientation to facilitate acceptor molecules, Y6, to permeate into polymer layer and increase donor/acceptor interfaces, but also sustains high crystallinity and appropriate miscibility with Y6 to acquire ordered molecular packing, thus achieving optimized vertical phase separation to well juggle exciton dissociation and charge transport in PPHJ devices. Therefore, DL1/Y6 based PPHJ OSCs gain the best exciton dissociation probability, highest charge carrier mobilities and weakest charge recombination, and thus afford an impressive PCE of 19.10%, which is the record value for terpolymer donors. It demonstrates that ternary polymerization is an efficient method to optimize vertical phase separation in PPHJ OSCs for high PCEs. Ternary polymerization strategy is employed to manipulate the vertical phase separation in pseudoplanar heterojunction (PPHJ) organic solar cells (OSCs). The terpolymer DL1, with enhanced solubility, partial edge-on orientation, and high crystallinity, endows DL1/Y6 PPHJ blend film with the optimized vertical phase separation. Therefore, DL1/Y6 based PPHJ OSCs afford an impressive PCE of 19.10%, which is the record for terpolymer ***

关键词： layer-by-layer techniques organic solar cells terpolymers vertical phase separation

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Highly sensitive label-free antibody detection using a long period fibre grating sensor

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SENSORS AND ACTUATORS B-CHEMICAL 2018年 271卷 24-32页

作者： Liu, LiangLiang Marques, Leonel Correia, Ricardo Morgan, Stephen P. Lee, Seung-Woo Tighe, Paddy Fairclough, Lucy Korposh, Serhiy Univ Nottingham Opt & Photon Grp Fac Engn Univ Pk Nottingham England Univ Nottingham Sch Life Sci Fac Med & Hlth Sci Div Infect Immun & Microbes Nottingham England Univ Kitakyushu Grad Sch Environm Engn Kitakyushu Fukuoka Japan

An optical fibre long period grating (LPG) biosensor is appealing in the detection of biomolecules because of the high sensitivity, label-free and real-time measurement. The miniaturized size, ability of remote sensing and immunity to electromagnetic interference of the LPG biosensor provide various possibility of single-point sensing in situations such as point of care diagnostics and in vivo measurement. Two optical fibre LPG based biosensors are reported for detection of streptavidin (SV) and immunoglobulin M (IgM) respectively. The LPG is coated with a film containing three layers of Poly(allylamine hydrochloride)/gold coated silica nanoparticles via the layer-by-layer method. Biotin is covalently bonded to the surface of the gold shell by means of the formation of an amide bonds for detection of streptavidin. The concentration of SV in water for detection varied from 1.25 nM to 2.7 mu M. The LPG sensor, operating close to the phase matching condition shows a high sensitivity of 3.88 (ng/ mm(2))(-1) and a detection limit of 0.86 mu g/mm(2) for the detection of SV. The limit of detection is 22 times lower than previously demonstrated with this type of sensor. The developed IgM sensor has the same configuration of film but has anti-IgM embedded on the LPG instead of biotin, demonstrating versatility of the sensing platform. This was used for the detection of human IgM with concentrations from 15.6 mu g/ml to 1 mg/ml. The LPG sensor exhibits a sensitivity of 11 nm (ng/mm(2))(-1) for the detection of IgM with a detection limit of 15 pg/mm(2). The developed highly sensitive IgM sensor shows the potential application of clinical point of care for detection of lower concentration of IgM in vitro. The proposed biosensor exhibits high sensitivity and rapid detection of low concentrations biomolecules from the small size of SV to the large size of IgM.

关键词： Long period gratings Biosensor layer-by-layer techniques Optical fibre sensor Streptavidin Human IgM

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Human IgM detection using an optical fibre long period grating sensor 16

Human IgM detection using an optical fibre long period grati...

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16th IEEE SENSORS CONFERENCE

作者： Liu, LiangLiang Marques, Leonel Correia, Ricardo Morgan, Stephen P. Lee, Seung-Woo Tighe, Paddy Fairclough, Lucy Korposh, Serhiy Univ Nottingham Fac Engn Opt & Photon Grp Nottingham England Univ Nottingham Fac Med & Hlth Sci Sch Life Sci Div Infect Immun & Microbes Nottingham England Univ Kitakyushu Grad Sch Environm Engn Kitakyushu Fukuoka Japan

ISBN: (纸本)9781509010127

An optical fibre long period grating sensor coated with three layers of poly (allylamine hydrochloride) and silica core gold shell nanoparticles was developed for the detection of human IgM. Three different concentrations of IgM suspension (19nM, 83nM and 0.3 mu M) were detected. The sensor response time is less than 8 minutes and the binding of IgM can be observed dynamically at a concentration of 0.3 mu M. The binding constant of IgM on the LPG sensor is 23.9 (pM)(-1) based on the fitting of the Langmuir adsorption isotherm. The sensitivity of the LPG sensor is calculated as 11 nm/(ng/mm(2)) with a limit of detection of 0.0218 ng/mm(2).

关键词： Long period fibre gratings human IgM layer-by-layer techniques optical fibre sensor

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Human IgM detection using an optical fibre long period grating sensor

Human IgM detection using an optical fibre long period grati...

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IEEE Sensors Conference

作者： LiangLiang Liu Leonel Marques Ricardo Correia Stephen P. Morgan Seung-Woo Lee Paddy Tighe Lucy Fairclough Serhiy Korposh Optics and Photonics Group Faculty of Engineering University of Nottingham Graduate School of Environmental Engineering University of Kitakyushu Division of Infection Immunity and Microbes School of Life Sciences Faculty of Medicine and Health Sciences University of Nottingham

ISBN: (纸本)9781509010134

An optical fibre long period grating sensor coated with three layers of poly (allylamine hydrochloride) and silica core gold shell nanoparticles was developed for the detection of human IgM. Three different concentrations of IgM suspension (19nM, 83nM and 0.3 μM) were detected. The sensor response time is less than 8 minutes and the binding of IgM can be observed dynamically at a concentration of 0.3 μM. The binding constant of IgM on the LPG sensor is 23.9 (pM)~(-1) based on the fitting of the Langmuir adsorption isotherm. The sensitivity of the LPG sensor is calculated as 11 nm/(ng/mm~2) with a limit of detection of 0.0218 ng/mm~2.

关键词： Long period fibre gratings Human IgM layer-by-layer techniques Optical fibre sensor

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HKUST-1 coated piezoresistive microcantilever array for volatile organic compound sensing

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MICRO & NANO LETTERS 2013年第11期8卷 766-769页

作者： Ellern, Ilya Venkatasubramanian, Anandram Lee, Jin-Hwan Hesketh, Peter Stavila, Vitalie Robinson, Alex Allendorf, Mark Georgia Inst Technol Dept Mech Engn Atlanta GA 30332 USA Intel Corp Rio Rancho NM 87124 USA Sandia Natl Labs Livermore CA 94551 USA Sandia Natl Labs Albuquerque NM 87185 USA

The HKUST-1 metal-organic framework (MOF) was selected because of the large internal surface area, excellent stability and known properties. Mechanical strain is generated upon the adsorption of analytes into the MOF;it is proportional to concentration and is a function of adsorbed species. Piezoresistive microcantilevers serve as a transduction mechanism to convert surface strain into electrical signals. N-doped piezoresistive cantilever arrays were fabricated with ten structures per die. Thin films of HKUST-1 were grown at room temperature using layer-by-layer techniques. Dry nitrogen was used as a carrier gas to expose devices to varying concentrations of 12 different volatile organic compounds (VOCs). Results show that stress-induced piezoresistive microcantilever array sensors with MOF coatings can provide a highly sensitive and reversible sensing mechanism for water vapour and methanol. Characteristic response features allow discrimination based on shape, response time constants and magnitude of response for other VOCs. Devices provided reliable data and proved durable over 18 months of testing. The key advantages of this type of sensor are higher sensitivity with a microporous MOFs, reversible response, single chip sensing system and low power operation.

关键词： adsorption cantilevers chemical sensors copper compounds microsensors organic compounds piezoresistive devices thin films transducers microfabrication temperature 293 K to 298 K microporous MOF coatings low power operation single chip sensing system reversible response response time constants characteristic response features methanol water vapour stress-induced piezoresistive microcantilever array sensors carrier gas dry nitrogen layer-by-layer techniques thin films N-doped piezoresistive cantilever arrays electrical signals surface strain transduction mechanism analyte adsorption mechanical strain internal surface area HKUST-1 metal-organic framework volatile organic compound sensing HKUST-1 coated piezoresistive microcantilever array

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Silk-on-Silk layer-by-layer Microcapsules

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ADVANCED MATERIALS 2011年第40期23卷 4655-+页

作者： Shchepelina, Olga Drachuk, Irina Gupta, Maneesh K. Lin, Jeffrey Tsukruk, Vladimir V. Georgia Inst Technol Sch Mat Sci & Engn Atlanta GA 30332 USA

Single-component silk-on-silk microcapsules based on a layer-by-layer approach demonstrate the fabrication of highly permeable microcapsules with controlled permeability, porosity, and shell thickness. The formation of monodisperse robust capsules is afforded as a result of the formation of a beta-sheet-rich structure of the absorbed silk proteins and hydrophobic-hydrophobic interactions.

关键词： microcapsules silk layer-by-layer techniques shell permeability porous materials

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layer-by-layer Liquid-Phase Epitaxy of Crystalline Coordination Polymers at Surfaces

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ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 2009年第34期48卷 6205-6208页

作者： Fischer, Roland A. Woell, Christof Ruhr Univ Bochum D-44780 Bochum Germany

Topping it off: layer-by-layer growth was used to produce a highly oriented crystalline surface coordination polymer made up of copper dithiooxamide complexes (see scheme; SAM=self-assembled monolayer). This example demonstrates that layer-by-layer growth in the liquid phase can produce a highly crystalline system even in difficult cases.

关键词： coordination modes coordination polymers layer-by-layer techniques metal-organic frameworks surface chemistry

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layer-by-layer deposition of polyelectrolytes - A versatile tool for the in vivo repair of blood vessels

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ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 2004年第8期43卷 926-928页

作者： Groth, T Lendlein, A GKSS Forschungszentrum Geesthacht GmbH Inst Chem D-14513 Teltow Germany

Polyelectrolytes are macromolecules that have a large number of charged orchargeable groups when dissolved in poalr solvents,primarily *** are typicallyweak polyacids or *** dissolution of polyelectrolytes in water,th... 详细信息

关键词： layer-by-layer techniques medicinal chemistry nanolayers polyelectrolytes

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