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Nanoscale mapping of low\u2010energy plasmon modes can be characterized using scanning transmission electron microscopy\/electron energy\u2010loss spectroscopy (STEM\u2010EELS). However, achieving sufficient energy resolution to extract low\u2010energy LSPR signals typically requires advanced instrumentation, such as a monochromator and\/or a cold\u2010field emission gun. Here, an accessible STEM\u2010EELS approach is developed for resolving LSPRs using a conventional non\u2010monochromated TEM. Silica\u2010coated gold nanorods (Au@SiO\n                    <jats:sub>2<\/jats:sub>\n                    NRs) are investigated using low\u2010dose, low\u2010keV STEM\u2010EELS combined with Richardson\u2010Lucy deconvolution and principal component analysis, reducing the average full width at half maximum of the zero\u2010loss peak to 0.46\u00a0eV and enabling the resolution of closely spaced LSPRs without a monochromator or other specialized hardware. Successful resolution of the longitudinal and transverse LSPR modes enables the visualization of the electromagnetic field distribution around the Au@SiO\n                    <jats:sub>2<\/jats:sub>\n                    NRs. Three\u2010dimensional electron tomography and finite element method simulations further validate the experimentally resolved plasmon distributions and field localization. This work establishes a broadly accessible strategy for high energy resolution plasmon mapping using standard STEM instrumentation, extending the capabilities of conventional electron microscopy platforms.\n                  <\/jats:p>","DOI":"10.1002\/smtd.71125","type":"journal-article","created":{"date-parts":[[2026,10,21]],"date-time":"2026-10-21T11:26:36Z","timestamp":1792581996000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Energy\u2010Resolved Localized Surface Plasmon Resonances With Non\u2010Monochromated STEM\u2010EELS Assisted by Multivariate Analysis"],"prefix":"10.1002","author":[{"ORCID":"https:\/\/orcid.org\/0009-0000-8778-2743","authenticated-orcid":false,"given":"Sara D.","family":"Catingan","sequence":"first","affiliation":[{"name":"Department of Chemistry, Centre in Green Chemistry and Catalysis McGill University  Montr\u00e9al 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