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- 저자 : Troiani, Vincent (검색결과 3 건)
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Fukuzumi, Shunichi,Saito, Kenji,Ohkubo, Kei,Troiani, Vincent,Qiu, Hongjin,Gadde, Suresh,D'Souza, Francis,Solladié,, Nathalie Royal Society of Chemistry 2011 Physical chemistry chemical physics Vol.13 No.38
<P>Multiple charge-separation sites have successfully been constructed using supramolecular complexes of multiporphyrinic oligopeptides [P(ZnP)<SUB><I>n</I></SUB>, <I>n</I> = 2, 4, 8] with fulleropyrrolidine bearing a pyridine or imidazole coordinating ligand, which are organized by utilizing π–π interaction in addition to the coordination bond.</P> <P>Graphic Abstract</P><P>Multiple photosynthetic reaction centres have been constructed using zinc multiporphyrinic peptides with fulleropyrrolidine bearing a pyridine or imidazole coordinating ligand to afford long-lived charge-separated states. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c1cp22364j'> </P>
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Hasobe, Taku,Saito, Kenji,Kamat, Prashant V.,Troiani, Vincent,Qiu, Hongjin,Solladié,, Nathalie,Kim, Kil Suk,Park, Jong Kang,Kim, Dongho,D'Souza, Francis,Fukuzumi, Shunichi Royal Society of Chemistry 2007 Journal of materials chemistry Vol.17 No.39
<P>We have constructed supramolecular solar cells composed of a series of porphyrin–peptide oligomers [porphyrin functionalized α-polypeptides, P(H<SUB>2</SUB>P)<SUB><I>n</I></SUB> or P(ZnP)<SUB><I>n</I></SUB> (<I>n</I> = 1, 2, 4, 8, 16)], and fullerenes assembled on a nanostructured SnO<SUB>2</SUB> electrode using an electrophoretic deposition method. Remarkable enhancement in the photoelectrochemical performance as well as the broader photoresponse in the visible and near-infrared regions is seen with increasing the number of porphyrin units in α-polypeptide structures. Formation of supramolecular clusters of porphyrins and fullerenes prepared in acetonitrile–toluene = 3 : 1 has been confirmed by transmission electron micrographs (TEM) and the absorption spectra. The highly colored composite clusters of porphyrin–peptide oligomers and fullerenes have been assembled as three-dimensional arrays onto nanostructured SnO<SUB>2</SUB> films using an electrophoretic deposition method. A high power conversion efficiency (<I>η</I>) of ∼1.6% and the maximum incident photon-to-photocurrent efficiency (IPCE = 56%) were attained using composite clusters of free base and zinc porphyrin–peptide hexadecamers [P(H<SUB>2</SUB>P)<SUB>16</SUB> and P(ZnP)<SUB>16</SUB>] with fullerenes, respectively. Femtosecond transient absorption and fluorescence measurements of porphyrin–fullerene composite films confirm improved electron-transfer properties with increasing number of porphyrins in a polypeptide unit. The formation of molecular assemblies between porphyrins and fullerenes with a polypeptide structure controls the electron-transfer efficiency in the supramolecular complexes, meeting the criteria required for efficient light energy conversion.</P> <P>Graphic Abstract</P><P>Solar cells capable of incident photon-to-current conversion efficiency of up to 56% were constructed using a series of porphyrin–peptide oligomers and fullerene assemblies. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=b706678c'> </P>
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Raffaella Di Sante,Lorenzo Donati,Enrico Troiani,Paolo Proli 대한금속·재료학회 2014 METALS AND MATERIALS International Vol.20 No.3
This work investigated issues for an efficient and reliable embedding and use of Fiber Bragg Grating (FBG)sensors for strain monitoring of composite structures with particular regard to the manufacturing processof components in the nautical field by means of the vacuum bag technique in autoclave. CFRP materiallaminates with embedded FBGs were produced and the effect of the curing process parameters on the lighttransmission characteristics of the optical fibers was initially investigated. Two different types of coating,namely polyimide and acrylate, were tested by measuring the light attenuation by an Optical Time DomainReflectometer. Tensile specimens were subsequently extracted from the laminas and instrumented also with asurface-mounted conventional electrical strain gage (SG). Comparison between the FBG and SG measurementsduring static tensile tests allowed the evaluation of the strain monitoring capability of the FBGs, inparticular of their sensitivity (i.e., gage factor) when embedded.
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