{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,3]],"date-time":"2026-09-03T15:11:14Z","timestamp":1788448274542,"version":"build-2803163510"},"reference-count":43,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2020,1,17]],"date-time":"2020-01-17T00:00:00Z","timestamp":1579219200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100007637","name":"Departamento Administrativo de Ciencia, Tecnolog\u00eda e Innovaci\u00f3n (COLCIENCIAS)","doi-asserted-by":"publisher","award":["FP44842-298-2018 (Programa Colombia BIO, Gobernaci\u00f3n de Boyac\u00e1)"],"award-info":[{"award-number":["FP44842-298-2018 (Programa Colombia BIO, Gobernaci\u00f3n de Boyac\u00e1)"]}],"id":[{"id":"10.13039\/100007637","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Nanomaterials"],"abstract":"<jats:p>Caffeic acid (CA) molecules were immobilized in a layered inorganic host matrix based on zinc hydroxide structures with different starting interlayer anions, nitrate, and acetate. The chemical composition, structure, thermal stability, morphology, and surface of the host matrices and hybrid compounds were analyzed by X-ray diffraction (XRD), themogravimetric\/differencial thermal analysis (TG\/DTA), Fourier transform infrarred spectroscopy (FT-IR), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). Additionally, the surface charge of the materials was investigated using zeta potential at pH ~7. The results show an influence of the surface charge on the chemical, interaction, and structure of the resulting hybrid materials as a function of the starting layered structures. An expansion of the basal spacing to 10.20 \u00c5 for zinc hydroxide nitrate (ZHN), and a shrinkage to 10.37 \u00c5 for zinc hydroxide acetate (ZHA). These results suggest that the CA lies with a tilt angle in the interlayer region of the inorganic host matrix. The immobilization of CA is favored in ZHN, with respect to ZHA, because a single-layered phase was identified. A higher thermal stability at 65 \u00b0C was observed for ZHN-CA than for ZHA-CA. The evaluation of the release behavior showed a higher percentage of CA released from ZHN than ZHA, and the release mechanism was described by the Elovich model. The hybrid materials show potential characteristics for use as bioactive delivery systems.<\/jats:p>","DOI":"10.3390\/nano10010163","type":"journal-article","created":{"date-parts":[[2020,1,17]],"date-time":"2020-01-17T07:39:02Z","timestamp":1579246742000},"page":"163","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Structural, Thermal, and Release Properties of Hybrid Materials Based on Layered Zinc Hydroxide and Caffeic Acid"],"prefix":"10.3390","volume":"10","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4924-6728","authenticated-orcid":false,"given":"Christhy V.","family":"Ruiz","sequence":"first","affiliation":[{"name":"Laboratorio de Materiales Nanoestructurados y Funcionales, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Colombia- Sede Manizales, Kilometro 9 v\u00eda al aeropuerto, La Nubia, 170003 Manizales, Colombia"},{"name":"Grupo de Investigaci\u00f3n en Procesos Qu\u00edmicos, Catal\u00edticos y Biotecnol\u00f3gicos, Universidad Nacional de Colombia-Sede Manizales, Kilometro 9 v\u00eda al aeropuerto, La Nubia, 170003 Manizales, Colombia"},{"name":"Departamento de Ingenier\u00eda Qu\u00edmica, Facultad de Ingenier\u00eda y Arquitectura, Universidad Nacional de Colombia-Sede Manizales, Kilometro 9 v\u00eda al aeropuerto, La Nubia, 170003 Manizales, Colombia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mar\u00eda E.","family":"Becerra","sequence":"additional","affiliation":[{"name":"Laboratorio de Materiales Nanoestructurados y Funcionales, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Colombia- Sede Manizales, Kilometro 9 v\u00eda al aeropuerto, La Nubia, 170003 Manizales, Colombia"},{"name":"Grupo de Investigaci\u00f3n en Procesos Qu\u00edmicos, Catal\u00edticos y Biotecnol\u00f3gicos, Universidad Nacional de Colombia-Sede Manizales, Kilometro 9 v\u00eda al aeropuerto, La Nubia, 170003 Manizales, Colombia"},{"name":"Departamento de Ingenier\u00eda Qu\u00edmica, Facultad de Ingenier\u00eda y Arquitectura, Universidad Nacional de Colombia-Sede Manizales, Kilometro 9 v\u00eda al aeropuerto, La Nubia, 170003 Manizales, Colombia"},{"name":"Departamento de F\u00edsica y Qu\u00edmica, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Colombia-Sede Manizales, Kilometro 9 v\u00eda al aeropuerto, La Nubia, 170003 Manizales, Colombia"},{"name":"Departamento de Qu\u00edmica, Universidad de Caldas, Calle 65 No. 26-10, 17001 Manizales, Colombia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9213-6348","authenticated-orcid":false,"given":"Oscar","family":"Giraldo","sequence":"additional","affiliation":[{"name":"Laboratorio de Materiales Nanoestructurados y Funcionales, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Colombia- Sede Manizales, Kilometro 9 v\u00eda al aeropuerto, La Nubia, 170003 Manizales, Colombia"},{"name":"Grupo de Investigaci\u00f3n en Procesos Qu\u00edmicos, Catal\u00edticos y Biotecnol\u00f3gicos, Universidad Nacional de Colombia-Sede Manizales, Kilometro 9 v\u00eda al aeropuerto, La Nubia, 170003 Manizales, Colombia"},{"name":"Departamento de F\u00edsica y Qu\u00edmica, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Colombia-Sede Manizales, Kilometro 9 v\u00eda al aeropuerto, La Nubia, 170003 Manizales, Colombia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2020,1,17]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"2553","DOI":"10.1039\/b819094a","article-title":"Layered nanomaterials for green materials","volume":"19","author":"Oh","year":"2009","journal-title":"J. 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