000056135 001__ 56135
000056135 005__ 20210121114535.0
000056135 0247_ $$2doi$$a10.1039/C5NR01819F
000056135 0248_ $$2sideral$$a89583
000056135 037__ $$aART-2015-89583
000056135 041__ $$aeng
000056135 100__ $$aUson, L.
000056135 245__ $$aSpontaneous formation of Au-Pt alloyed nanoparticles using pure nano-counterparts as starters: a ligand and size dependent process
000056135 260__ $$c2015
000056135 5060_ $$aAccess copy available to the general public$$fUnrestricted
000056135 5203_ $$aIn this work we investigate the formation of PtAu monodisperse alloyed nanoparticles by ageing pure metallic Au and Pt small nanoparticles (sNPs), nanoparticle size <5 nm, under certain conditions. We demonstrate that those bimetallic entities can be obtained by controlling the size of the initial metallic sNPs separately prepared and by selecting their appropriate capping agents. The formation of this spontaneous phenomenon was studied using HR-STEM, EDS, ionic conductivity, UV-Vis spectroscopy and cyclic voltammetry. Depending on the type of capping agent used and the size of the initial Au sNPs, three different materials were obtained: (i) AuPt bimetallic sNPs showing a surface rich in Au atoms, (ii) segregated Au and Pt sNPs and (iii) a mixture of bimetallic nanoparticles as well as Pt sNPs and Au NPs. Surface segregation energies and the nature of the reaction environment are the driving forces to direct the distribution of atoms in the bimetallic sNPs. PtAu alloyed nanoparticles were obtained after 150 h of reaction at room temperature if a weak capping agent was used for the stabilization of the nanoparticles. It was also found that Au atoms diffuse towards Pt sNPs, producing a surface enriched in Au atoms. This study shows that even pure nanoparticles are prone to be modified by the surrounding nanoparticles to give rise to new nanomaterials if atomic diffusion is feasible.
000056135 536__ $$9info:eu-repo/grantAgreement/EC/FP7/614715/EU/A Photo-triggered On-demand Drug Delivery System for Chronic Pain/NANOHEDONISM$$9info:eu-repo/grantAgreement/EC/FP7/321642/EU/Development of a microfluidic platform to produce nanomaterials and assessment on new nanotechnology applications/PLATFORM2NANO$$9info:eu-repo/grantAgreement/EC/FP7/312483/EU/Enabling Science and Technology through European Electron Microscopy/ESTEEM 2
000056135 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/
000056135 590__ $$a7.76$$b2015
000056135 591__ $$aMATERIALS SCIENCE, MULTIDISCIPLINARY$$b23 / 271 = 0.085$$c2015$$dQ1$$eT1
000056135 591__ $$aNANOSCIENCE & NANOTECHNOLOGY$$b12 / 83 = 0.145$$c2015$$dQ1$$eT1
000056135 591__ $$aCHEMISTRY, MULTIDISCIPLINARY$$b18 / 163 = 0.11$$c2015$$dQ1$$eT1
000056135 591__ $$aPHYSICS, APPLIED$$b12 / 145 = 0.083$$c2015$$dQ1$$eT1
000056135 592__ $$a2.77$$b2015
000056135 593__ $$aNanoscience and Nanotechnology$$c2015$$dQ1
000056135 593__ $$aMaterials Science (miscellaneous)$$c2015$$dQ1
000056135 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000056135 700__ $$aSebastian, V.
000056135 700__ $$0(orcid)0000-0002-5229-2717$$aMayoral, A.
000056135 700__ $$aHueso, J. L.
000056135 700__ $$aEguizabal, A.
000056135 700__ $$aArruebo, M.
000056135 700__ $$aSantamaria, J.
000056135 773__ $$g1, 3 (2015), [10 pp]$$pNanoscale$$tNanoscale$$x2040-3364
000056135 8564_ $$s4361035$$uhttps://zaguan.unizar.es/record/56135/files/texto_completo.pdf$$yVersión publicada
000056135 8564_ $$s112432$$uhttps://zaguan.unizar.es/record/56135/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000056135 909CO $$ooai:zaguan.unizar.es:56135$$particulos$$pdriver
000056135 951__ $$a2021-01-21-11:13:09
000056135 980__ $$aARTICLE