Supramolecular SciencePub Date : 1998-10-01Epub Date: 1999-02-16DOI: 10.1016/S0968-5677(98)00091-1
Qing Zhang , Bin He , Qing Dai , Jian-hua Gu , Ning Gu , Deyin Huang
{"title":"Surface plasmon resonance on the LB monolayer of solvent-soluble silicon phthalocyanine","authors":"Qing Zhang , Bin He , Qing Dai , Jian-hua Gu , Ning Gu , Deyin Huang","doi":"10.1016/S0968-5677(98)00091-1","DOIUrl":"10.1016/S0968-5677(98)00091-1","url":null,"abstract":"<div><p>Thin films of <em>bis</em>-(<em>p</em>-chlorophenoxy) (<em>tetra</em>-4-nitrophthalocyaninato)silicon, TNPcSi(OPhCl-<em>p</em>)<sub>2</sub>, were prepared by using Langmir-Blodgett techniques and the morphology of the film was investigated by AFM (atomic force microscope) analysis. It has been found that the LB films were successfully transferred onto substrates like mica, gold deposited glass, and pure glass with domains aggregated on the substrates. Surface plasmon resonance has been used to investigate the interaction between sulfur dioxide and a monolayer of TNPcSi(OPhCl-<em>p</em>)<sub>2</sub> LB film. It has been found that the monolayer of LB film transferred onto gold deposited glass gave a 0.55° shift of resonant angle and an additional 0.45° shift of resonant angle after exposion in sulfur dioxideatomospheric ambient for twenty minute. The UV–visible absorption spectrum of the LB films of TNPcSi(OPhCl-<em>p</em>)<sub>2</sub> showed that there is chemical changes in the film after the exposure to the sulfur dioxide ambient. This work has shown a promising application as an optical gas sensor.</p></div>","PeriodicalId":22050,"journal":{"name":"Supramolecular Science","volume":"5 5","pages":"Pages 631-634"},"PeriodicalIF":0.0,"publicationDate":"1998-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0968-5677(98)00091-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82351536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Supramolecular SciencePub Date : 1998-10-01Epub Date: 1999-02-16DOI: 10.1016/S0968-5677(98)00103-5
Junhong Min , Hyun-Goo Choi , Jeong-Woo Choi , Won Hong Lee , Rak Kim
{"title":"Optimal fabrication condition of bacteriorhodopsin films by electrophoretic sedimentation technique","authors":"Junhong Min , Hyun-Goo Choi , Jeong-Woo Choi , Won Hong Lee , Rak Kim","doi":"10.1016/S0968-5677(98)00103-5","DOIUrl":"10.1016/S0968-5677(98)00103-5","url":null,"abstract":"<div><p>The photocurrent of bacteriorhodopsin (bR) films fabricated by electrophoretic sedimentation (EPS) technique was investigated. The fabrication conditions by EPS, the intensity of electric field and exposure time, affected the photoelectric response and topology of bR films. Based on the photoelectric response and surface topology measured by an atomic force microscope (AFM), the optimal electric field for the fabrication of oriented bR film was 20<!--> <!-->V/cm. The exposure time of 45<!--> <!-->s did not affect the photocurrent of bR film but longer exposures damaged the bR films. The action spectrum of bR films fabricated by EPS technique was well consistent to the absorption spectrum of bR solution.</p></div>","PeriodicalId":22050,"journal":{"name":"Supramolecular Science","volume":"5 5","pages":"Pages 687-690"},"PeriodicalIF":0.0,"publicationDate":"1998-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0968-5677(98)00103-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86416477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Supramolecular SciencePub Date : 1998-10-01Epub Date: 1999-02-16DOI: 10.1016/S0968-5677(98)00063-7
Minhua Xu, Jianmin Ma, Jianhua Gu, Zuhong Lu
{"title":"Photocatalytic TiO2 nanoparticles damage to cellular membranes and genetic supramolecules","authors":"Minhua Xu, Jianmin Ma, Jianhua Gu, Zuhong Lu","doi":"10.1016/S0968-5677(98)00063-7","DOIUrl":"10.1016/S0968-5677(98)00063-7","url":null,"abstract":"<div><p>Photocatalytic TiO<sub>2</sub> nanoparticles are effective photocatalyzers which can damage the cellular membranes and genetic supramolecules such as DNA. In this experiment, we observed the lesion efficacy of the photocatalytic TiO<sub>2</sub> nanoparticles upon the cellular membrane and genetic molecule by transmission electron microscopy and single cell gel electrophoresis assay, and the mechanisim of the cell death by photocatalytic TiO<sub>2</sub> nanoparticles.</p></div>","PeriodicalId":22050,"journal":{"name":"Supramolecular Science","volume":"5 5","pages":"Pages 511-513"},"PeriodicalIF":0.0,"publicationDate":"1998-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0968-5677(98)00063-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78146017","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Supramolecular SciencePub Date : 1998-10-01Epub Date: 1999-02-16DOI: 10.1016/S0968-5677(98)00096-0
Lianyong Su, Hong Wang, Zuhong Lu
{"title":"All solid-state electrochromic smart window of electrodeposited WO3 and prussian blue film with PVC gel electrolyte","authors":"Lianyong Su, Hong Wang, Zuhong Lu","doi":"10.1016/S0968-5677(98)00096-0","DOIUrl":"10.1016/S0968-5677(98)00096-0","url":null,"abstract":"<div><p>An all solid-state electrochromic smart window of prussian blue and electrodeposited WO<sub>3</sub> film with poly(vinyl chloride) (PVC) gel electrolyte was fabricated. The smart window has been found to be excellent for electrochromism and memory characteristics. The transmittance response only lost less than 10% of the initial magnitude even after the potential stepping of 5000 cycles.</p></div>","PeriodicalId":22050,"journal":{"name":"Supramolecular Science","volume":"5 5","pages":"Pages 657-659"},"PeriodicalIF":0.0,"publicationDate":"1998-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0968-5677(98)00096-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83618172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Supramolecular SciencePub Date : 1998-10-01Epub Date: 1999-02-16DOI: 10.1016/S0968-5677(98)00121-7
Nicholas G. Rambidi
{"title":"Neural network devices based on reaction–duffusion media: an approach to artificial retina","authors":"Nicholas G. Rambidi","doi":"10.1016/S0968-5677(98)00121-7","DOIUrl":"10.1016/S0968-5677(98)00121-7","url":null,"abstract":"<div><p>Neural network architecture of devices based on reaction–diffusion media is discussed. Image processing operations performed by these media are similar to first steps of human vision mechanism.</p></div>","PeriodicalId":22050,"journal":{"name":"Supramolecular Science","volume":"5 5","pages":"Pages 765-767"},"PeriodicalIF":0.0,"publicationDate":"1998-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0968-5677(98)00121-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79479579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Supramolecular SciencePub Date : 1998-10-01Epub Date: 1999-02-16DOI: 10.1016/S0968-5677(98)00088-1
Zhongdang Xiao, Minhua Xu, Ming Li, Zuhong Lu, Yu Wei
{"title":"Preparation of asymmetric bilayer-vesicles with inner and outer monolayers composed of different amphiphilic molecules","authors":"Zhongdang Xiao, Minhua Xu, Ming Li, Zuhong Lu, Yu Wei","doi":"10.1016/S0968-5677(98)00088-1","DOIUrl":"10.1016/S0968-5677(98)00088-1","url":null,"abstract":"<div><p>Asymmetric vesicles were prepared layer by layer from reverse micelles. The aqueous solution was first entrapped into reverse micelles prepared from lipid, then these reverse micelles penetrated the monolayer formed by another kind of amphiphilic agent at organic solvent/water interface by centrifugation and were assembled spontaneously by the second layer to form asymmetric vesicles. In general, the diameters of the vesicles ranged from 30 to 100<!--> <!-->nm. A fluorescein quenching experiment showed that asymmetric vesicles with the inner layer being lipid and the outer layer being single-chain amphiphilic molecules, [(bpy)<sub>2</sub> Ru(diazafluorenone) (CH<sub>2</sub>)<sub>15</sub>CH<sub>3</sub>](PF<sub>6</sub>)<sub>2</sub>, were successfully prepared. The half-life of flip–flop of the amphiphilic molecules between inner and outer layers was estimated to be about 17 days.</p></div>","PeriodicalId":22050,"journal":{"name":"Supramolecular Science","volume":"5 5","pages":"Pages 619-622"},"PeriodicalIF":0.0,"publicationDate":"1998-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0968-5677(98)00088-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88547155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Supramolecular SciencePub Date : 1998-10-01Epub Date: 1999-02-16DOI: 10.1016/S0968-5677(98)00107-2
Qian Weiping, Yu Fang, Song Zhendong, Liang Bingjie, Wei Yu
{"title":"Site–specific immobilization of Fab’ fragments of goat antihuman IgG on quartz surfaces","authors":"Qian Weiping, Yu Fang, Song Zhendong, Liang Bingjie, Wei Yu","doi":"10.1016/S0968-5677(98)00107-2","DOIUrl":"10.1016/S0968-5677(98)00107-2","url":null,"abstract":"<div><p>This paper presents a strategy for immobilizing biomolecules onto a solid surface. We used the free thiol group directing method to immobilize Fab’ fragments to the MPTMS derived quartz substrate and results of X-ray photoelectron spectroscopic studies on the binding of MTPMS and Fab’ fragments on the quartz surfaces are reported. We also prepared a new type of immuno-labeled protein which was the rare earth element labeled antigen (human IgG) to recognize Fab’ fragment. Four characteristic peaks has been determined on the surface specifically bound human IgG labeled Tb<sup>3+</sup>.</p></div>","PeriodicalId":22050,"journal":{"name":"Supramolecular Science","volume":"5 5","pages":"Pages 701-703"},"PeriodicalIF":0.0,"publicationDate":"1998-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0968-5677(98)00107-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76930131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Supramolecular SciencePub Date : 1998-10-01Epub Date: 1999-02-16DOI: 10.1016/S0968-5677(98)00058-3
De-gang Fu , Ming Li , Xin Wang , Ji-qi Cheng , Yu Zhang , Zu-hong Lu , Ju-zheng Liu , Yi-ping Cui
{"title":"The CdS nanoparticle with capped surface and its nonlinear optical properties studied by hyper-Rayleigh scattering","authors":"De-gang Fu , Ming Li , Xin Wang , Ji-qi Cheng , Yu Zhang , Zu-hong Lu , Ju-zheng Liu , Yi-ping Cui","doi":"10.1016/S0968-5677(98)00058-3","DOIUrl":"10.1016/S0968-5677(98)00058-3","url":null,"abstract":"<div><p>The CdS nanoparticles synthesized in AOT (bis(2-ethylhexyl) sulfosuccinate, disodium salt) reverse micelle in addition of the electric neutral surface-capping agent of pyridine are characterized by XPS, TEM and the absorption spectra. The values of the first-order hyperpolarizability <em>β</em> for two kinds of nanoparticles, CdS/AOT<sup>-</sup> and CdS/pyridine/AOT<sup>-</sup>, have been experimentally measured in solution by the newly developed hyper-Rayleigh scattering technique. The values of <em>β</em> are larger than 10<sup>-27</sup> <!-->esu, which are among the largest values reported for solution species.</p></div>","PeriodicalId":22050,"journal":{"name":"Supramolecular Science","volume":"5 5","pages":"Pages 495-498"},"PeriodicalIF":0.0,"publicationDate":"1998-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0968-5677(98)00058-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85459764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Supramolecular SciencePub Date : 1998-10-01Epub Date: 1999-02-16DOI: 10.1016/S0968-5677(98)00094-7
Tomasz Martynski, Jun Miyake
{"title":"Langmuir–Blodgett films of dichroic dyes oriented by liquid crystal","authors":"Tomasz Martynski, Jun Miyake","doi":"10.1016/S0968-5677(98)00094-7","DOIUrl":"10.1016/S0968-5677(98)00094-7","url":null,"abstract":"<div><p>A cyanobiphenyl molecular film mixed with nonamphiphilic azobenzene and benzimidazole derivative dichroic dyes was transferred from an air–water interface onto a hydrophilic quartz plate. 4-cyano-4-octylbiphenyl is a liquid crystal material which played the role of a host in the mixed films. The mole fraction of dye to cyanobiphenyl molecules was varied from 0.5 to 0.02. One layer was successfully deposited onto a quartz plate with the transfer ratio slightly higher than one. The films were deposited at a surface pressure <em>π</em> between 1 and 15<!--> <!-->mN/m. The structure of the film at the air–water interface was observed by using a Brewster angle microscope. The orientation of cyanobiphenyl as well as dye molecules were estimated by polarized absorption spectra. The angle of the cyanobiphenyl <span><math><mtext>(β</mtext><msub><mi></mi><mn><mtext>H</mtext></mn></msub><mtext>)</mtext></math></span> molecules between the long molecular axis and normal to the quartz surface in pure and mixed monolayers was found to be between 64° and 54°. These values depend on the surface pressure during deposition. The smaller angles were observed for mixed layers and for high surface pressure. Analyzing polarized spectra of dyes incorporated in the monolayer made similar observations. The dyes show a sharper angle <span><math><mtext>β</mtext><msub><mi></mi><mn><mtext>G</mtext></mn></msub><mtext>=(60°–38°)</mtext></math></span> than host molecules <span><math><mtext>(β</mtext><msub><mi></mi><mn><mtext>H</mtext></mn></msub><mtext>=(64°–54°)</mtext></math></span>. The dye absorption spectra at the high dye concentration and surface pressure differ from those for the films deposited at low concentration or low surface pressure.</p></div>","PeriodicalId":22050,"journal":{"name":"Supramolecular Science","volume":"5 5","pages":"Pages 643-647"},"PeriodicalIF":0.0,"publicationDate":"1998-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0968-5677(98)00094-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81370723","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Supramolecular SciencePub Date : 1998-10-01Epub Date: 1999-02-16DOI: 10.1016/S0968-5677(98)00066-2
Nongyue He , Chunwei Yuan , Zuhong Lu , Chun Yang , Liangsheng Liao , Shulin Bao , Qinhua Xu
{"title":"The very strong photoluminescent (PL) effect of mesoporous molecular sieve materials","authors":"Nongyue He , Chunwei Yuan , Zuhong Lu , Chun Yang , Liangsheng Liao , Shulin Bao , Qinhua Xu","doi":"10.1016/S0968-5677(98)00066-2","DOIUrl":"10.1016/S0968-5677(98)00066-2","url":null,"abstract":"<div><p>MCM-41 mesoporous molecular sieve materials with nanometer-sized pores show the very strong photoluminescent (PL) effect and the Al-depleted defect sites are responsible for this strong PL effect of the investigated MCM-41 samples. The porous channel structures of molecular sieves are another factor influencing the investigated PL effect.</p></div>","PeriodicalId":22050,"journal":{"name":"Supramolecular Science","volume":"5 5","pages":"Pages 523-526"},"PeriodicalIF":0.0,"publicationDate":"1998-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0968-5677(98)00066-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83610702","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}