SwePub
Sök i SwePub databas

  Utökad sökning

Träfflista för sökning "WFRF:(Inganäs Olle) "

Sökning: WFRF:(Inganäs Olle)

  • Resultat 51-60 av 542
Sortera/gruppera träfflistan
   
NumreringReferensOmslagsbildHitta
51.
  • Asplund, Maria, et al. (författare)
  • Electroactive polymers for neural interfaces
  • 2010
  • Ingår i: Polymer chemistry. - : Royal Society of Chemistry (RSC). - 1759-9954 .- 1759-9962. ; 1:9, s. 1374-1391
  • Forskningsöversikt (refereegranskat)abstract
    • Development of electroactive conjugated polymers, for the purpose of recording and eliciting signals in the neural systems in humans, can be used to fashion the interfaces between the two signalling systems of electronics and neural systems. The design of desirable chemical, mechanical and electrical properties in the electroactive polymer electrodes, and the means of integration of these into biological systems, are here reviewed.
  •  
52.
  •  
53.
  • Asplund, M, et al. (författare)
  • Toxicity evaluation of PEDOT/biomolecular composites intended for neural communication electrodes
  • 2009
  • Ingår i: BIOMEDICAL MATERIALS. - : IOP Publishing. - 1748-6041 .- 1748-605X. ; 4:4, s. 045009-
  • Tidskriftsartikel (refereegranskat)abstract
    • Electrodes coated with the conducting polymer poly(3,4-ethylene dioxythiophene) (PEDOT) possess attractive electrochemical properties for stimulation or recording in the nervous system. Biomolecules, added as counter ions in electropolymerization, could further improve the biomaterial properties, eliminating the need for surfactant counter ions in the process. Such PEDOT/biomolecular composites, using heparin or hyaluronic acid, have previously been investigated electrochemically. In the present study, their biocompatibility is evaluated. An agarose overlay assay using L929 fibroblasts, and elution and direct contact tests on human neuroblastoma SH-SY5Y cells are applied to investigate cytotoxicity in vitro. PEDOT: heparin was further evaluated in vivo through polymer-coated implants in rodent cortex. No cytotoxic response was seen to any of the PEDOT materials tested. The examination of cortical tissue exposed to polymer-coated implants showed extensive glial scarring irrespective of implant material (Pt:polymer or Pt). However, quantification of immunological response, through distance measurements from implant site to closest neuron and counting of ED1+ cell density around implant, was comparable to those of platinum controls. These results indicate that PEDOT: heparin surfaces were non-cytotoxic and show no marked difference in immunological response in cortical tissue compared to pure platinum controls.
  •  
54.
  • Asplund, Maria, 1978-, et al. (författare)
  • Wire electronics and woven logic, as a potential technology for neuroelectronic implants
  • Annan publikation (populärvet., debatt m.m.)abstract
    • New strategies to improve neuron coupling to neuroelectronic implants are needed. In particular, to maintain functional coupling between implant and neurons, foreign body response like encapsulation must me minimized. Apart from modifying materials to mitigate encapsulation it has been shown that with extremely thin structures, encapsulation will be less pronounced. We here utilize wire electrochemical transistors (WECTs) using conducting polymer coated fibers. Monofilaments down to 10 μm can be successfully coated and weaved into complex networks with built in logic functions, so called textile logic. Such systems can control signal patterns at a large number of electrode terminals from a few addressing fibres. Not only is fibre size in the range where less encapsulation is expected but textiles are known to make successful implants because of their soft and flexible mechanical properties. Further, textile fabrication provides versatility and even three dimensional networks are possible. Three possible architectures for neuroelectronic systems are discussed. WECTs are sensitive to dehydration and materials for better durability or improved encapsulation is needed for stable performance in biological environments.
  •  
55.
  • Assadi, A., et al. (författare)
  • Interaction of planar polymer Schottky barrier diodes with gaseous substances
  • 1994
  • Ingår i: Sensors and actuators. B, Chemical. - : Elsevier. - 0925-4005 .- 1873-3077. ; 20:1, s. 71-77
  • Tidskriftsartikel (refereegranskat)abstract
    • Conducting polymers appear very attractive as sensor materials either as the gas-sensitive component or as a matrix for easy immobilization of a specific substrate. The planar Schottky barrier diode with poly(3-octylthiophene), P3OT, as the semiconductor is used as a sensor for the detection of different gas species. The shifts in the current-voltage (C-V) characteristics as well as the C-V characteristics of the diodes due to water and ethanol vapour, ammonia gas and nitric oxide gases are studied. Nitric oxide and ammonia give the largest and most specific changes of the C-V characteristics. Nitric oxide has a doping effect, which increases the reverse current, while ammonia is the only gas that causes a negative change in the forward bias current of the I-V curve. The planar configuration of the Schottky barrier diode facilitates the absorption of gaseous species in the environment, and provides a simple method for production of gas sensors.
  •  
56.
  • Bakulin, Artem A., et al. (författare)
  • Morphology, Temperature, and Field Dependence Separation in High-Efficiency Solar Cells Based on Polyquinoxaline Copolymer
  • 2016
  • Ingår i: The Journal of Physical Chemistry C. - : AMER CHEMICAL SOC. - 1932-7447 .- 1932-7455. ; 120:8, s. 4219-4226
  • Tidskriftsartikel (refereegranskat)abstract
    • Charge separation and recombination are key processes determining the performance of organic optoelectronic devices. Here we combine photoluminescence and photovoltaic characterization of organic solar cell devices with ultrafast multipulse photocurrent spectroscopy to investigate charge generation mechanisms in the organic photovoltaic devices based on a blend of an alternating polyquinoxaline copolymer with fullerene. The combined use of these techniques enables the determination of the contributions of geminate and bimolecular processes to the solar cell performance. We observe that charge separation is not a temperature-activated process in the studied materials. At the same time, the generation of free charges shows a dear external field and morphology dependence. This indicates that the critical step of charge separation involves the nonequilibrium state that is formed at early times after photoexcitation, when the polaronic localization is not yet complete. This work reveals new aspects of molecular level charge dynamics in the organic light-conversion systems.
  •  
57.
  • Bantikassegn, W., et al. (författare)
  • Absence of Schottky barrier formation in junctions of Al and polypyrrole-polyelectrolyte polymer complexes
  • 1993
  • Ingår i: Thin Solid Films. - 0040-6090 .- 1879-2731. ; 224:2, s. 232-236
  • Tidskriftsartikel (refereegranskat)abstract
    • Thin films of conducting polypyrrole doped with large polymeric anions of polystyrene-sulphonate are electrochemically prepared to study the metal/polymer junctions. Aluminium and gold contacts are vacuum deposited to form metal/polymer/gold sandwich structures for current-voltage characterization. Photoelectron spectroscopy, using UV and X-ray photons, is carried out to investigate the possible causes of current limitation in the Al/PPy(PSS) junction.
  •  
58.
  • Bantikassegn, W., et al. (författare)
  • Proceedings of the International Conference on Science and Technology of Synthetic Metals Electronic properties of polypyrrole (polystyrene-sulphonate)/metal junctions
  • 1993
  • Ingår i: Synthetic metals. - 0379-6779 .- 1879-3290. ; 55:1, s. 36-42
  • Tidskriftsartikel (refereegranskat)abstract
    • The nature of polymer/metal interfaces is decisive for the operation of polymer based electronic devices. At such interfaces charge transport may be affected by barrier formation, or by formation of insulating interfaces of various types. We have prepared thin films of conducting polypyrrole doped with large polymeric anions of polystyrenesulphonate for studies in metal/polymer junctions. Aluminium and gold contacts are vacuum deposited to form metal/polymer/gold sandwich structures. The current-voltage characteristics show that the interface between polypyrrole and gold is ohmic with no current limitation. However, the aluminium/polypyrrole interface forms highly resistive and nonohmic contacts. Photoelectron spectroscopy using UV and X-ray photons reveals a decrease of the work function upon Al deposition, reactions between Al and the sulphonate anions, and immediate oxidation of the aluminium upon exposure to oxygen. These observations corroborate the interpretation that the current limitation found at Al/polypyrrole junctions is due to formation of insulating aluminium oxide, not excluding reactions between the metal and dopant. It is also pointed out that interfaces between reactive metals and polymers are prone to such oxide interface formation, considering the high diffusivity of oxygen in many polymers.
  •  
59.
  •  
60.
  • Barrau, Sophie, et al. (författare)
  • Nanomorphology of Bulk Heterojunction Organic Solar Cells in 2D and 3D Correlated to Photovoltaic Performance
  • 2009
  • Ingår i: Macromolecules. - : American Chemical Society (ACS). - 0024-9297 .- 1520-5835. ; 42:13, s. 4646-4650
  • Tidskriftsartikel (refereegranskat)abstract
    • Control of the nanoscale morphology of the donor-acceptor material blends inorganic solar Cells is critical for optimizing the photovoltaic performances. The influence of intrinsic (acceptor materials) and extrinsic (donor:acceptor weight ratio, substrate, solvent) parameters was investigated, by atomic force microscopy (AFM) and electron tomography (ET), on the nanoscale phase separation of blends of a low-band-gap alternating polyfluorene copolymers (APFO-Green9) with [6,6]-phenyl-C-71-butyric acid methyl ester ([70]PCBM). The photovoltaic performances display an optimal efficiency for the device elaborated with a 1:3 APFO-Green polymer:[70][PCBM weight ratio and spin-coated from chloroform solution. The associated active layer morphology presents small phase-separated domains which is a good balance between as a large interfacial donor-acceptor area and Continuous paths of the donor and acceptor phases to the electrodes.
  •  
Skapa referenser, mejla, bekava och länka
  • Resultat 51-60 av 542
Typ av publikation
tidskriftsartikel (416)
konferensbidrag (58)
doktorsavhandling (35)
forskningsöversikt (13)
annan publikation (12)
bokkapitel (8)
visa fler...
visa färre...
Typ av innehåll
refereegranskat (445)
övrigt vetenskapligt/konstnärligt (93)
populärvet., debatt m.m. (4)
Författare/redaktör
Inganäs, Olle (427)
Inganäs, Olle, 1951- (89)
Zhang, Fengling (79)
Andersson, Mats, 196 ... (58)
Andersson, M.R. (35)
Andersson, Mats R (35)
visa fler...
Wang, Ergang, 1981 (33)
Berggren, Magnus (31)
Tang, Zheng (27)
Zhang, Fengling, 196 ... (23)
Solin, Niclas (23)
Xia, Yuxin (22)
Vandewal, Koen (21)
Sundström, Villy (20)
Yartsev, Arkady (20)
Gao, Feng (20)
Elfwing, Anders (19)
Svensson, M. (18)
Melianas, Armantas (18)
Theander, M. (18)
Nilsson, Peter (17)
Andersson, Mattias (17)
Hamedi, Mahiar (16)
Musumeci, Chiara (14)
Herland, Anna (14)
Johansson, Tomas (13)
Müller, Christian, 1 ... (13)
Admassie, Shimelis (13)
Tress, Wolfgang (13)
Inganäs, Olle, Profe ... (12)
Muller, Christian (12)
Ma, Zaifei (12)
Ajjan, Fátima (11)
Björk, Per (11)
Andersson, Viktor (11)
Perzon, Erik (10)
Mammo, Wendimagegn, ... (10)
Ouyang, Liangqi (10)
Hjertberg, T. (10)
Nyberg, Tobias (10)
Zhou, Yi (10)
Pettersson, Lars (9)
Gustafsson, Göran (9)
Gabrielsson, Roger (9)
Lundström, Ingemar (9)
Ederth, Thomas (9)
Persson, Nils-Kriste ... (9)
Tvingstedt, Kristofe ... (9)
Wennerström, O. (9)
Granström, Magnus (9)
visa färre...
Lärosäte
Linköpings universitet (511)
Chalmers tekniska högskola (75)
Lunds universitet (35)
Kungliga Tekniska Högskolan (27)
Karlstads universitet (9)
Karolinska Institutet (7)
visa fler...
Umeå universitet (2)
Uppsala universitet (2)
RISE (2)
Göteborgs universitet (1)
Högskolan i Borås (1)
Sveriges Lantbruksuniversitet (1)
visa färre...
Språk
Engelska (539)
Svenska (2)
Odefinierat språk (1)
Forskningsämne (UKÄ/SCB)
Naturvetenskap (228)
Teknik (76)
Medicin och hälsovetenskap (5)
Lantbruksvetenskap (2)

År

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy