000227167 001__ 227167
000227167 005__ 20181203024625.0
000227167 0247_ $$2doi$$a10.1038/nnano.2016.179
000227167 022__ $$a1748-3395
000227167 02470 $$2ISI$$a000392042400017
000227167 037__ $$aARTICLE
000227167 245__ $$aNanoscale topographical control of capillary assembly of nanoparticles
000227167 260__ $$bNature Publishing Group$$c2017
000227167 269__ $$a2017
000227167 336__ $$aJournal Articles
000227167 520__ $$aPredetermined and selective placement of nanoparticles onto large-area substrates with nanometre-scale precision is essential to harness the unique properties of nanoparticle assemblies, in particular for functional optical and electro-optical nanodevices. Unfortunately, such high spatial organization is currently beyond the reach of top-down nanofabrication techniques alone. Here, we demonstrate that topographic features comprising lithographed funnelled traps and auxiliary sidewalls on a solid substrate can deterministically direct the capillary assembly of Au nanorods to attain simultaneous control of position, orientation and interparticle distance at the nanometre level. We report up to 100% assembly yield over centimetre-scale substrates. We achieve this by optimizing the three sequential stages of capillary nanoparticle assembly: insertion of nanorods into the traps, resilience against the receding suspension front and drying of the residual solvent. Finally, using electron energy-loss spectroscopy we characterize the spectral response and near-field properties of spatially programmable Au nanorod dimers, highlighting the opportunities for precise tunability of the plasmonic modes in larger assemblies.
000227167 700__ $$0245734$$g180486$$aFlauraud, Valentin
000227167 700__ $$0244528$$g208618$$aMastrangeli, Massimo
000227167 700__ $$0248694$$g215352$$aBernasconi, Gabriel D.
000227167 700__ $$0246829$$g231356$$aButet, Jeremy
000227167 700__ $$0242217$$g180921$$aAlexander, Duncan T. L.
000227167 700__ $$aShahrabi, Elmira$$0248695$$g215240
000227167 700__ $$0244723$$g159310$$aMartin, Olivier J. F.
000227167 700__ $$0240120$$g145781$$aBrugger, Juergen
000227167 773__ $$j12$$tNature Nanotechnology$$k1$$q73-80
000227167 909C0 $$xU10192$$0252025$$pCIME
000227167 909C0 $$pLMIS1$$xU10321$$0252040
000227167 909C0 $$xU10373$$0252353$$pNAM
000227167 909CO $$pSB$$pSTI$$particle$$ooai:infoscience.tind.io:227167
000227167 917Z8 $$x159310
000227167 917Z8 $$x144315
000227167 937__ $$aEPFL-ARTICLE-227167
000227167 973__ $$rREVIEWED$$sPUBLISHED$$aEPFL
000227167 980__ $$aARTICLE