Surface chemical functionalisation of epoxy photoresist-based microcantilevers with organic-coated TiO2 nanocrystals

Publication: Research - peer-reviewJournal article – Annual report year: 2012

Standard

Surface chemical functionalisation of epoxy photoresist-based microcantilevers with organic-coated TiO2 nanocrystals. / Ingrosso, C.; Sardella, E.; Keller, S. S.; Striccoli, M.; Agostiano, A.; Boisen, A.; Curri, M. L.

In: Micro and Nano Letters, Vol. 7, No. 4, 2012, p. 337-342.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

Harvard

APA

CBE

MLA

Vancouver

Author

Ingrosso, C.; Sardella, E.; Keller, S. S.; Striccoli, M.; Agostiano, A.; Boisen, A.; Curri, M. L. / Surface chemical functionalisation of epoxy photoresist-based microcantilevers with organic-coated TiO2 nanocrystals.

In: Micro and Nano Letters, Vol. 7, No. 4, 2012, p. 337-342.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

Bibtex

@article{45f6f157676c495c994cbc25653384df,
title = "Surface chemical functionalisation of epoxy photoresist-based microcantilevers with organic-coated TiO2 nanocrystals",
publisher = "institution of engineering and technology (iet)",
author = "C. Ingrosso and E. Sardella and Keller, {S. S.} and M. Striccoli and A. Agostiano and A. Boisen and Curri, {M. L.}",
year = "2012",
doi = "10.1049/mnl.2011.0673",
volume = "7",
number = "4",
pages = "337--342",
journal = "Micro and Nano Letters",
issn = "1750-0443",

}

RIS

TY - JOUR

T1 - Surface chemical functionalisation of epoxy photoresist-based microcantilevers with organic-coated TiO2 nanocrystals

A1 - Ingrosso,C.

A1 - Sardella,E.

A1 - Keller,S. S.

A1 - Striccoli,M.

A1 - Agostiano,A.

A1 - Boisen,A.

A1 - Curri,M. L.

AU - Ingrosso,C.

AU - Sardella,E.

AU - Keller,S. S.

AU - Striccoli,M.

AU - Agostiano,A.

AU - Boisen,A.

AU - Curri,M. L.

PB - institution of engineering and technology (iet)

PY - 2012

Y1 - 2012

N2 - In this Letter, a solution-based approach has been used for chemically immobilising oleic acid (OLEA)-capped TiO2 nanocrystals (NCs) on the surface of microcantilevers formed of SU-8, a negative tone epoxy photoresist. The immobilisation has been carried out at room temperature, under visible light, in ambient atmosphere and without applying any external driving force or chemical activation of the epoxy photoresist surface. Atomic force microscopy, scanning electron microscopy and X-ray photoelectron spectroscopy investigation demonstrate the spontaneous chemical anchoring of the organic-coated TiO2 NCs on the microcantilevers, which resulted in a highly interconnected nanoporous multilayer structure. The chemical and morphological characterisation shows that the immobilised NCs do not change either their pristine morphology or the chemical structure after binding. Spectroscopic investigation infers that the TiO2 NCs chemically bind through the free and highly reactive epoxy groups located on the epoxy photoresist surface by means of the OLEA capping molecules. Finally, the results show that the fabrication procedure of the microcantilevers has not been affected by the immobilisation protocol. The capability of the immobilised TiO2 NCs to generate surface-reactive hydroxyl radicals under UV-light irradiation has a good potential for detecting families of organic compounds when integrating the modified microcantilevers in electronic noses.

AB - In this Letter, a solution-based approach has been used for chemically immobilising oleic acid (OLEA)-capped TiO2 nanocrystals (NCs) on the surface of microcantilevers formed of SU-8, a negative tone epoxy photoresist. The immobilisation has been carried out at room temperature, under visible light, in ambient atmosphere and without applying any external driving force or chemical activation of the epoxy photoresist surface. Atomic force microscopy, scanning electron microscopy and X-ray photoelectron spectroscopy investigation demonstrate the spontaneous chemical anchoring of the organic-coated TiO2 NCs on the microcantilevers, which resulted in a highly interconnected nanoporous multilayer structure. The chemical and morphological characterisation shows that the immobilised NCs do not change either their pristine morphology or the chemical structure after binding. Spectroscopic investigation infers that the TiO2 NCs chemically bind through the free and highly reactive epoxy groups located on the epoxy photoresist surface by means of the OLEA capping molecules. Finally, the results show that the fabrication procedure of the microcantilevers has not been affected by the immobilisation protocol. The capability of the immobilised TiO2 NCs to generate surface-reactive hydroxyl radicals under UV-light irradiation has a good potential for detecting families of organic compounds when integrating the modified microcantilevers in electronic noses.

U2 - 10.1049/mnl.2011.0673

DO - 10.1049/mnl.2011.0673

JO - Micro and Nano Letters

JF - Micro and Nano Letters

SN - 1750-0443

IS - 4

VL - 7

SP - 337

EP - 342

ER -