000132110 001__ 132110 000132110 005__ 20240301161205.0 000132110 0247_ $$2doi$$a10.1021/acsnano.0c04154 000132110 0248_ $$2sideral$$a131579 000132110 037__ $$aART-2020-131579 000132110 041__ $$aeng 000132110 100__ $$aTang, C. 000132110 245__ $$aChelating phosphine ligand stabilized AuNPs in methane detection 000132110 260__ $$c2020 000132110 5060_ $$aAccess copy available to the general public$$fUnrestricted 000132110 5203_ $$aThe capping reagent plays an essential role in the functional properties of gold nanoparticles (AuNPs). Multiple stimuli-responsive materials are generated via diverse surface modification. The ability of the organic ligand shell on a gold surface to create a porous shell capable of binding small molecules is demonstrated as an approach to detect molecules, such as methane, that would be otherwise difficult to sense. Thiols are the most studied capping ligands of AuNPs used in chemiresistors. Phosphine capping groups are usually seen as stabilizers in synthesis and catalysis. However, by virtue of the pyramidal shape of triarylphosphines, they are natural candidates to create intrinsic voids within the ligand shell of AuNPs. In this work, surface-functionalized (capped) AuNPs with chelating phosphine ligands are synthesized via two synthetic routes, enabling chemiresistive methane gas detection at sub-100 ppm levels. These AuNPs are compared to thiol-capped AuNPs, and studies were undertaken to evaluate structure–property relationships for their performance in the detection of hydrocarbons. Polymer overcoatings applied to the conductive networks of the functionalized AuNP arrays were shown to reduce resistivity by promoting the formation of conduction pathways with decreased core–core distance between nanoparticles. Observations made in the context of developing methane sensors provide insight relevant to applications of phosphine or phosphine-containing surface groups in functional AuNP materials. 000132110 540__ $$9info:eu-repo/semantics/openAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/ 000132110 590__ $$a15.881$$b2020 000132110 591__ $$aCHEMISTRY, PHYSICAL$$b12 / 162 = 0.074$$c2020$$dQ1$$eT1 000132110 591__ $$aNANOSCIENCE & NANOTECHNOLOGY$$b11 / 106 = 0.104$$c2020$$dQ1$$eT1 000132110 591__ $$aCHEMISTRY, MULTIDISCIPLINARY$$b14 / 178 = 0.079$$c2020$$dQ1$$eT1 000132110 591__ $$aMATERIALS SCIENCE, MULTIDISCIPLINARY$$b21 / 333 = 0.063$$c2020$$dQ1$$eT1 000132110 592__ $$a5.554$$b2020 000132110 593__ $$aEngineering (miscellaneous)$$c2020$$dQ1 000132110 593__ $$aPhysics and Astronomy (miscellaneous)$$c2020$$dQ1 000132110 593__ $$aNanoscience and Nanotechnology$$c2020$$dQ1 000132110 593__ $$aMaterials Science (miscellaneous)$$c2020$$dQ1 000132110 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/acceptedVersion 000132110 700__ $$aKu, K. H. 000132110 700__ $$aLennon Luo, S. X. 000132110 700__ $$0(orcid)0000-0002-8932-9085$$aConcellón, A. 000132110 700__ $$aWu, Y.-C. M. 000132110 700__ $$aLu, R-Q. 000132110 700__ $$aSwager, T. M. 000132110 773__ $$g14, 9 (2020), 11605-11612$$pACS Nano$$tACS NANO$$x1936-0851 000132110 8564_ $$s1735405$$uhttps://zaguan.unizar.es/record/132110/files/texto_completo.pdf$$yPostprint 000132110 8564_ $$s3314274$$uhttps://zaguan.unizar.es/record/132110/files/texto_completo.jpg?subformat=icon$$xicon$$yPostprint 000132110 909CO $$ooai:zaguan.unizar.es:132110$$particulos$$pdriver 000132110 951__ $$a2024-03-01-14:47:00 000132110 980__ $$aARTICLE