{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,11,5]],"date-time":"2026-11-05T05:30:00Z","timestamp":1793856600977,"version":"4.6.1"},"reference-count":37,"publisher":"SAGE Publications","issue":"9-10","license":[{"start":{"date-parts":[[2026,5,19]],"date-time":"2026-05-19T00:00:00Z","timestamp":1779148800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"funder":[{"DOI":"10.13039\/501100001691","name":"Japan Society for the Promotion of Science","doi-asserted-by":"publisher","award":["Grant-in-Aid Challenges in Research (Exploratory)"],"award-info":[{"award-number":["Grant-in-Aid Challenges in Research (Exploratory)"]}],"id":[{"id":"10.13039\/501100001691","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001691","name":"Japan Society for the Promotion of Science","doi-asserted-by":"publisher","award":["Grant-in-Aid for JSAP Fellows (No. 24KJ1499)"],"award-info":[{"award-number":["Grant-in-Aid for JSAP Fellows (No. 24KJ1499)"]}],"id":[{"id":"10.13039\/501100001691","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001691","name":"Japan Society for the Promotion of Science","doi-asserted-by":"publisher","award":["Grant-in-Aid for Scientific Research(B) (No. 22H02"],"award-info":[{"award-number":["Grant-in-Aid for Scientific Research(B) (No. 22H02"]}],"id":[{"id":"10.13039\/501100001691","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Appl Spectrosc"],"published-print":{"date-parts":[[2026,10]]},"abstract":"<jats:p>\n                    Although atomic force microscopy\u2013infrared (AFM\u2013IR) spectroscopy enables nanoscale infrared characterization, the dielectric origin of its spectral contrast, particularly the role of collective vibrational modes, remains incompletely understood. Here, we investigate the correlation between nanoscale infrared spectra and surface morphology using thin films of perfluorotetracosane (C\n                    <jats:sub>2<\/jats:sub>\n                    <jats:sub>4<\/jats:sub>\n                    F\n                    <jats:sub>5<\/jats:sub>\n                    <jats:sub>0<\/jats:sub>\n                    ). By comparing low-temperature vapor-deposited films and their aged counterparts, we track aging-induced morphological evolution from lying-oriented sub-micrometer aggregates to standing-oriented crystalline grains. For discussing fine features in the nano-scale spectrum, infrared p-polarized multiple-angle incidence resolution spectroscopy (pMAIRS) is also employed as a macroscopic reference in advance. The pMAIRS analysis reveals pronounced longitudinal\u2013transverse optical (LO\u2013TO) splitting, which increases upon aging due to an enhanced Berreman-type longitudinal field contribution associated with surface flattening and improved crystallinity. Nanoscale AFM\u2013IR measurements in a resonance-enhanced-mode with top-down illumination configuration demonstrate that the local spectral response is predominantly governed by the transverse optical (TO) dielectric function, while surface phonon\u2013polariton (SPP) modes are strongly enhanced, reflecting localized electromagnetic field confinement at crystalline grains. Through rigorous cross-scale comparisons of macroscopic and nanoscale spectroscopy, this study has experimentally established the dominant TO-controlled contrast mechanism in top-down AFM\u2013IR and revealed the characteristics of SPP-driven nanoscale spectra. These results demonstrate that AFM\u2013IR is a powerful probe for investigating both the chemical identity of surface-active organic materials and nanoscale surface morphology.\n                  <\/jats:p>","DOI":"10.1177\/00037028261450651","type":"journal-article","created":{"date-parts":[[2026,5,19]],"date-time":"2026-05-19T13:39:09Z","timestamp":1779197949000},"page":"1212-1220","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["Surface Morphology Analysis of Thin Films of Perfluoroalkanes Using Atomic Force Microscopy\u2013Infrared (AFMIR) with Respect to Surface Phonon\u2013Polariton Modes"],"prefix":"10.1177","volume":"80","author":[{"given":"Takayuki","family":"Oka","sequence":"first","affiliation":[{"name":"Laboratory of Chemistry for Functionalized Surfaces, Division of Environmental Chemistry, Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nobutaka","family":"Shioya","sequence":"additional","affiliation":[{"name":"Laboratory of Chemistry for Functionalized Surfaces, Division of Environmental Chemistry, Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5574-9869","authenticated-orcid":false,"given":"Takeshi","family":"Hasegawa","sequence":"additional","affiliation":[{"name":"Laboratory of Chemistry for Functionalized Surfaces, Division of Environmental Chemistry, Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2026,5,19]]},"reference":[{"key":"e_1_3_3_2_2","doi-asserted-by":"publisher","DOI":"10.1039\/d2cs00095d"},{"key":"e_1_3_3_3_2","doi-asserted-by":"publisher","DOI":"10.1021\/acs.chemrev.6b00448"},{"key":"e_1_3_3_4_2","doi-asserted-by":"publisher","DOI":"10.1063\/1.3429214"},{"key":"e_1_3_3_5_2","doi-asserted-by":"publisher","DOI":"10.1021\/acs.analchem.7b03878"},{"key":"e_1_3_3_6_2","doi-asserted-by":"publisher","DOI":"10.1063\/1.5116280"},{"key":"e_1_3_3_7_2","doi-asserted-by":"publisher","DOI":"10.1364\/ome.7.003706"},{"key":"e_1_3_3_8_2","doi-asserted-by":"publisher","DOI":"10.1063\/5.0063902"},{"key":"e_1_3_3_9_2","doi-asserted-by":"publisher","DOI":"10.1177\/0003702816658673"},{"key":"e_1_3_3_10_2","doi-asserted-by":"publisher","DOI":"10.1063\/5.0190441"},{"key":"e_1_3_3_11_2","doi-asserted-by":"publisher","DOI":"10.1038\/s41598-018-37166-6"},{"key":"e_1_3_3_12_2","doi-asserted-by":"publisher","DOI":"10.1063\/5.0012910"},{"key":"e_1_3_3_13_2","doi-asserted-by":"publisher","DOI":"10.1021\/acsmacrolett.7b00147"},{"key":"e_1_3_3_14_2","doi-asserted-by":"publisher","DOI":"10.1107\/s1600576719004485"},{"key":"e_1_3_3_15_2","doi-asserted-by":"publisher","DOI":"10.1021\/ma00221a021"},{"key":"e_1_3_3_16_2","doi-asserted-by":"publisher","DOI":"10.1246\/bcsj.20200139"},{"key":"e_1_3_3_17_2","doi-asserted-by":"publisher","DOI":"10.1021\/acs.jpcc.3c02636"},{"key":"e_1_3_3_18_2","doi-asserted-by":"publisher","DOI":"10.1002\/cplu.201402156"},{"key":"e_1_3_3_19_2","doi-asserted-by":"publisher","DOI":"10.1002\/tcr.201700018"},{"key":"e_1_3_3_20_2","doi-asserted-by":"publisher","DOI":"10.1021\/ma050394k"},{"key":"e_1_3_3_21_2","doi-asserted-by":"publisher","DOI":"10.1007\/s44211-025-00797-7"},{"key":"e_1_3_3_22_2","doi-asserted-by":"publisher","DOI":"10.11308\/tjsst.16.24"},{"key":"e_1_3_3_23_2","doi-asserted-by":"publisher","DOI":"10.1063\/1.1671471"},{"key":"e_1_3_3_24_2","doi-asserted-by":"publisher","DOI":"10.1021\/acs.jpca.7b08940"},{"key":"e_1_3_3_25_2","doi-asserted-by":"publisher","DOI":"10.1021\/acs.jpca.0c00111"},{"key":"e_1_3_3_26_2","doi-asserted-by":"publisher","DOI":"10.35848\/1347-4065\/ad4ad8"},{"key":"e_1_3_3_27_2","doi-asserted-by":"publisher","DOI":"10.1002\/047010631X"},{"key":"e_1_3_3_28_2","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRev.140.A2076"},{"key":"e_1_3_3_29_2","doi-asserted-by":"publisher","DOI":"10.1103\/physrev.150.589"},{"key":"e_1_3_3_30_2","doi-asserted-by":"publisher","DOI":"10.1103\/physrev.150.573"},{"key":"e_1_3_3_31_2","doi-asserted-by":"publisher","DOI":"10.1016\/0039-6028(73)90184-2"},{"key":"e_1_3_3_32_2","doi-asserted-by":"publisher","DOI":"10.1002\/047123432x"},{"key":"e_1_3_3_33_2","doi-asserted-by":"publisher","DOI":"10.1103\/physrevb.91.121408"},{"key":"e_1_3_3_34_2","doi-asserted-by":"publisher","DOI":"10.1103\/physrev.130.2193"},{"key":"e_1_3_3_35_2","volume-title":"Handbook of Optics: Optical Materials and Properties","author":"Tropf W.J.","year":"2010","unstructured":"Tropf W.J., Thomas M.E., Harris T.J.. \u201cProperties of Crystals and Glass\u201d. 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