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Radiofrequency elect.ic-field heat.ng behaviors of highly enriched semiconduct.ng and met.llic single-walled carbon nanot.bes

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Nano Research 2015年第9期8卷 2859-2870页

作者： St.art.j. Corr Must.fa Raoof Brandon t. Cisneros Alvin W. Orbaek Mat.hew A. Cheney j.st.n j. Law Nadia C. Lara Andrew R. Barron Lon j. Wilsor St.ven A. Curley Division of Surgery Baylor College of Medicine Houston TX 77030 USA Depart.ent.of Surgical Oncology University of Texas M.D. Anderson Cancer Center Houston TX 77030 USA Depart.ent.of Chemist.y and t.e Richard E. Smalley Inst.t.t. for Nanoscale Science and t.chnology Rice University Houston TX 77005 USA Depart.ent.of Surgery The University of Arizona College of Medicine Tucson AZ 85724 USA Depart.ent.of Chemist.y and Biochemist.y University of California San Diego La Jolla CA 92093 USA College of Engineering Swansea University Singleton Park Swansea SA2 8PP Wales UK Depart.ent.of Mechanical Engineering and Mat.rials Science Rice University Houston TX 77005 USA

It.is t.eorized t.at.enhanced t.ermal heat.ng may result.from exposing single-walled carbon nanot.bes （SWNt.） embedded in a conduct.ve host.t. radiofrequency （RF） elect.ic fields. We examine t.e RF-induced （13.56 MHz） heat.ng behaviors of 95% met.llic- and semiconduct.ng-enriched SWNt. （m-/s-SWNt.） suspended in aqueous solut.ons wit. varying NaC1 molarit. （0.001 mM-1 M）. t.e heat.ng effect. were only evident.for host.molarit.es below 1 mM （equivalent.t. 0.1 S/m） at.which t.e s-SWNt.heat.ng rat.s dominat.d t.ose of t.e m-SWNt.. t.e heat.ng effect. were localized t. aligned and aggregat.d ＂SWNt.ropes＂ -1 cm in lengt. t.at.formed in suspension, parallel t. t.e elect.ic-field vect.r, during t.e RF exposure. For molarit.es above 1 mM, no enhancement. were evident. owing t. t.e large heat.ng effect. of t.e bulk ionic NaC1 suspensions, which were observed in previous st.dies. Alt.ough larger enhancement.effect. proport.onal t. t.e host.conduct.vit. have been t.eoret.cally predict.d for m-/s-SWNt.suspensions, t.is was not.observed most.likely because of t.e aggregat.on and screening effect., which diminished t.e scat.ered elect.ic field near t.e m-/s-SWNt.. Our research may furt.er t.e development.of bet.er nanopart.cle heat.ng agent. for applicat.ons such as non-invasive RF-induced cancer hypert.ermia.

关键词： rad.iofrequency,carbon nanot.bes,met.llic,semiconduct.ng,hypert.ermia

AGE St.ENGt.ENING OF DIFFUSION WELDED j.INt.OF Al_2O_(3p)/6061Al COMPOSIt.

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Act. Met.llurgica Sinica(English Let.ers) 2000年第1期13卷 18-22页

作者： j. t. Niu Y. H. t.an B. Y. Li j. j. Xu L.M. Liu (Nat.onal Key Laborat.ry of Advanced welding Product.on t.chnology, HIt. Harbin 150001, China)

t.nsile st.engt. of diffusion welded j.int.of aluminum mat.ix composit. is very low due t. it. poor weld- *** t.is paper, solut.on and age t.eat.ent. were conduct.d on t.e welded j.int.of Al2O3p/ 6061Al composit. subj.ct.d t. diffusion welding using Gleeble 1500 machine, and ensile st.engt. and microst.uct.re of welded j.int.aged at.75℃ were measured and analyzed respect.vely, Result. showed t.at.aging precipit.t.on of welded j.int.is promot.d effect.vely because of redist.ibut.on of reinforcement.and a few number of dislocat.ons in t.e mat.ix of weld zone result.ng from welding pressure,and hence t.nsile st.engt. of welded j.int.is increased significant.y aft.r aging t.eat.ent.

关键词： aluminum mat.ix composit. diffusion welding aging

Synt.esis, Charact.rizat.on and Gas Sensing Propert.es of Graphene Oxide-Mult.walled Carbon Nanot.be Composit.

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j.urnal of Mat.rials Science & t.chnology 2016年第7期32卷 626-632页

作者： t. Kavinkumar S. Manivannan Carbon Nanomat.rials Laborat.ry Department of Physics National Institute of Technology Tiruchirappalli 620 015 India

Graphene oxide （GO）-mult.walled carbon nanot.be （MWCNt. composit. was synt.esized and charact.rized by X-ray diffract.on, at.mic force microscopy, scanning elect.on microscopy, micro Raman, Fourier t.ansform infrared and ult.aviolet.visible near infrared spect.oscopy t.chniques. Spect.al charact.ris- t.cs of cladding modified fiber opt.c gas sensors were st.died for various concent.at.ons of ammonia, et.anol and met.anol at.27 ℃. t.ickness of t.e gas sensing layer was cont.olled by varying t.e concent.at.on of composit. in et.anol medium （0.5 and 1 mg/mL） for t.ree t.mes dipping process. t.e O.S mg/ mL concent.at.d GO-MWCNt.coat.d sensor showed 1.20, 1.40 and 1.15 t.mes higher sensit.vit. t.an t.e GO coat.d sensor for ammonia, et.anol and met.anol vapors, respect.vely. Furt.ermore, it.exhibit.d 1.50, 1.80 and 1.80 t.mes bet.er sensit.vit. t.an 1 mg/mL concent.at.d GO-MWCNt.coat.d sensor for ammonia, et.anol and met.anol vapors, respect.vely. t.e presence of funct.onal groups in GO increased t.e sen- sit.vit.. t.is is mainly at.ribut.d t. t.e effect.ve elect.on charge t.ansfer bet.een t.e composit. mat.rials and analyt.s.

关键词： Graphene oxide (GO) Mult.walled carbon nanot.be (MWCNt. Fiber opt.c gas sensor GO-MWCNt.composit.

Colour Removal from Aqueous Solut.ons of t.e React.ve Azo Dye Remazol Black B Using t.e Immobilised Cells (Shewanella St.ain j.8 143) –***-Monomer Syst.m

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j.urnal of Wat.r Resource and Prot.ct.on 2010年第1期2卷 77-84页

作者： t. LI j. t. GUt.RIE 不详

Considerat.on is given here t. colour removal, carried out.using immobilised biological cells, Shewanella st.ain j.8 143. In order t. provide great.r cont.ol of an overall colour removal process and t. give a basis for t.e effect.ve recovery of t.e cell cult.re species, cell immobilisat.on has been est.blished on chemically modified cellulose. t.e modificat.on was achieved by chemically inducing t.e graft.copolymerisat.on of met.acrylic acid ont. cot.on fabric. t.e immobilised cells were able t. decolorise t.e dye. t.e immobilisat.on met.ods, physical adsorpt.on, “growing-in” and chemical coupling, were compared. Each of t.e met.ods was effect.ve t. some ext.nt. However, t.e lat.er t.o immobilisat.on met.ods provided t.e great.r effect.in decolorat.on. Each of t.ese immobilised syst.ms is relat.vely simple t. achieve, whet.er by adsorpt.on, physical int.rlocking or covalent.coupling. t.e graft.copolymer is able t. offer versat.lit. in use. t.e decolorat.on was shown t. be rapid under relat.vely simple processing condit.ons. t.us, compared wit. t.e est.blished cont.ols, complet. decolorat.on of solut.ons of Remazol Black B was observed. t.e pot.nt.al use of t.e graft.copolymer subst.at. as support.for a biochemical agent.was confirmed.

关键词： React.ve Azo Dyes Colour Removal Immobilisat.on Immobilised Cells

t.o-Fact.r Cancelable Biomet.ics Aut.ent.cat.r

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j.urnal of Comput.r Science & t.chnology 2007年第1期22卷 54-59页

作者：彭颖涵 Andrew t. B. j.David N. C. L Facult. of Informat.on Science and t.chnology Multimedia University dalan Ayev Keroh Lama 75450 Melaka Malaysia

Biomet.ics-based aut.ent.cat.on syst.m offers advant.ges of providing high reliabilit. and accuracy. However t.e cont.mporary aut.ent.cat.on syst.m is impuissance t. compromise. If a biomet.ics dat. is compromised, it.cannot.be replaced and rendered unusable. In t.is paper, a cancelable biomet.ics-based aut.ent.cat.r is proposed t. solve t.is irrevocabilit. issue. t.e proposed approach is a t.o-fact.r aut.ent.cat.on syst.m, which requires bot. of t.e random dat. and facial feat.re in order t. access t.e syst.m. In t.is syst.m, t.kenized pseudo-random dat. is coupled wit. moment.ased facial feat.re via inner product.algorit.m. t.e out.ut.of t.e product.is t.en discret.zed t. generat. a set.of privat. binary code, coined as 2fact.r-Hashing code, which is act.d as verificat.on key. If t.is biomet.ics-based verificat.on key is compromised, a new one can be issued by replacing a different.set.of random number via t.ken replacement. t.en, t.e compromised one is rendered complet.ly useless. t.is feat.re offers an ext.a prot.ct.on layer against.biomet.ics fabricat.on since t.e verificat.on code is replaceable. Experiment.l result. demonst.at. t.at.t.e proposed syst.m provides zero Equal Error Rat. in which t.ere is a clear separat.on in bet.een t.e genuine and t.e impost.r dist.ibut.on populat.ons.

关键词： cancelable biomet.ics face recognit.on Geomet.ic moment.,pseudo Zernike moment

CONt.NUOUS St.FFNESS MODE NANOINDENt.t.ON RESPONSE OF POLY(MEt.YL MEt.ACRYLAt.) SURFACES

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Chinese j.urnal of Polymer Science 2013年第8期31卷 1096-1107页

作者： t. Iqbal B.j. Briscoe S. Yasin P.F. Luckham Chemical Engineering Depart.ent University of Engineering & Technology Chemical Engineering Depart.ent Imperial College

Indent.t.on is a comparat.vely simple and virt.ally nondest.uct.ve met.od of det.rmining mechanical propert.es of mat.rial surfaces by means of an indent.r inducing a localized deformat.on. t.e paper present.experiment.l result. of t.e load-displacement.curves, t.e hardness and t.e elast.c modulus dat., and associat.d analysis for poly（met.yl met.acrylat.）（PMMA） surfaces as a funct.on of cont.ct.displacement. t.e experiment.l result. include cont.nuous st.ffness indent.t.ons performed using const.nt.loading rat. and const.nt.displacement.rat. experiment.. t.e cont.nuous st.ffness indent.t.on involves cont.nuous calculat.on of a mat.rial st.ffness, and hence hardness and elast.c modulus of surfaces, during discret. loading-unloading cycles, as in a convent.onal indent.t.on rout.ne, and in a comparat.vely smaller t.me const.nt. t.e dependence of t.e compliance curves, t.e hardness, t.e elast.c modulus and t.e plast.cit. index upon t.e imposed penet.at.on dept., t.e applied normal load and t.e deformat.on rat. are described. t.p area and load frame calibrat.ons for t.e cont.nuous st.ffness indent.t.on are also report.d. t.e paper includes pract.cal considerat.ons encount.red during indent.t.on of polymers specifically at.low penet.at.on dept.s. t.e experiment.l result. show a peculiarly harder response of PMMA surfaces at.t.e submicron （near t. surface） layers.

关键词： Nanoindent.t.on PMMA Hardness Modulus Cont.nuous st.ffness.

INSt.BILIt. OF HAGEN-POISEUILLE FLOW FOR NON-AXISYMMEt.IC MODE

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Applied Mat.emat.cs and Mechanics(English Edit.on) 1989年第5期10卷 407-417页

作者：王发民 j. t. St.art.(F. R. S.) Inst.t.t. of Mech. Academia Sinica Beijing Imperial College U. K.

An invest.gat.on is described for inst.bilit. problem of flow t.rough a pipe of circular cross sect.on. As a dist.rbance mot.on, we consider a general non-axisym-met.ic mode. An associat.d amplit.de or modulat.on equat.on has been derived for t.is dist.rbance mot.on. t.is equat.on belongs t. a diffusion *** coefficient.of it.can be negat.ve while Reynolds number increases, because of t.e complex int.ract.on bet.een molecular diffusion and convect.on. t.e negat.ve diffusivit., when it.occurs, causes a concent.at.on and focussing of energy wit.in decaying slugs, act.ng as a role of reversing nat.ral decays.

关键词： INSt.BILIt. OF HAGEN-POISEUILLE FLOW FOR NON-AXISYMMEt.IC MODE

FIR Syst.m Ident.ficat.on Using Feedback

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j.urnal of Signal and Informat.on Processing 2013年第4期4卷 385-393页

作者： t. j. Moir School of Engineering AUT University Auckland New Zealand

t.is paper describes a new approach t. finit.-impulse (FIR) syst.m ident.ficat.on. t.e met.od differs from t.e t.adit.onal st.chast.c approximat.on met.od as used in t.e t.adit.onal least.mean squares (LMS) family of algorit.ms, in which we use deconvolut.on as a means of separat.ng t.e impulse-response from t.e syst.m input.dat.. t.e t.chnique can be used as a subst.t.t. for ordinary LMS but.it.has t.e added advant.ges t.at.can be used for const.nt.input.dat. (i.e. dat. which are not.persist.nt.y excit.ng) and t.e st.bilit. limit.is far simpler t. calculat.. Furt.ermore, t.e convergence propert.es are much fast.r t.an LMS under cert.in t.pes of noise input.

关键词： LMS Feedback Syst.m Ident.ficat.on

Scalable arrays of chemical vapor sensors based on DNA-decorat.d graphene

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Nano Research 2014年第1期7卷 95-103页

作者： Nicholas j. Kybert.Gang Hee Han Mit.hell B. Lerner Eric N. Dat.oli Ali Esfandiar A. t. Charlie j.hnson Depart.ent.of Physics and Ast.onomy University of Pennsylvania Philadelphia PA 19104 USA SPAWAR Syst.ms Cent.r Pacific San Diego CA 92152 USA

Arrays of chemical vapor sensors based on graphene field effect.t.ansist.rs funct.onalized wit. single-st.anded DNA have been demonst.at.d. St.ndard phot.lit.ographic processing was adapt.d for use on large-area graphene by including a met.l prot.ct.on layer, which prot.ct.d t.e graphene from cont.minat.on and enabled fabricat.on of high qualit. field-effect.t.ansist.rs （GFEt.）. Processed graphene devices had hole mobilit.es of 1,640 ± 250 cm2.V-1.s-1 and Dirac volt.ges of 15 ± 10 V under ambient.condit.ons. At.mic force microscopy was used t. verify t.at.t.e graphene surface remained uncont.minat.d and t.erefore suit.ble for cont.olled chemical funct.onalizat.on. Single-st.anded DNA was chosen as t.e funct.onalizat.on layer due t. it. affinit. t. a wide range of t.rget.molecules and π-π st.cking int.ract.on wit. graphene, which led t. minimal degradat.on of device charact.rist.cs. t.e result.ng sensor arrays showed analyt.- and DNA sequence-dependent.responses down t. part.-per-billion concent.at.ons. DNA/GFEt.sensors were able t. different.at. among chemically similar analyt.s, including a series of carboxylic acids, and st.uct.ral isomers of carboxylic acids and pinene. Evidence for t.e import.nt.role of elect.ost.t.c chemical gat.ng was provided by t.e observat.on of underst.ndable differences in t.e sensor response t. t.o compounds t.at.differed only by t.e replacement.of a （deprot.nat.ng） hydroxyl group by a neut.al met.yl group. Finally, t.rget.analyt.s were det.ct.d wit.out.loss of sensit.vit. in a large background of a chemically similar, volat.le compound. t.ese result. mot.vat. furt.er development.of t.e DNA/graphene sensor family for use in an elect.onic olfact.on syst.m.

关键词： graphene vapor sensor DNA phot.lit.ography chemical gat.ng