Photochemical Pattern Transfer and Enhancement of Thin Film Silica Mesophases

Dattelbaum, Andrew M.; Amweg, Meri L.; Ecke, Laurel E.; Yee, Chanel K.; Shreve, and Andrew P.; Parikh, Atul N.

doi:10.1021/nl0341279

Cited by 45 publications

(37 citation statements)

References 27 publications

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“…Prior to demonstrating photocalcination on the PET substrates, FTIR and XRD were used to investigate the relation between UV irradiation time and the properties of the exposed film. 18,31 Spectra ͑b͒-͑d͒ are for the MSSC film after photocalcination times of 30, 45, or 60 min, respectively. Figure 5 shows IR transmission spectra at 2600-3200 cm −1 for an MSSC film before and after photocalcination.…”

Section: Resultsmentioning

confidence: 99%

“…In particular, the micropatterning of such mesostructured and mesoporous materials is considered key in order to apply them to sensors and electronic or optical devices. [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] Thus far there have been no reports describing the microfabrication of mesostructured or mesoporous materials on polymer substrates. 17,18 However, in most cases, these micropatterning techniques were demonstrated on inorganic flat substrates such as Si, glass, or gold-covered mica.…”

Section: Introductionmentioning

confidence: 99%

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Fabrication of micropatterned mesoporous silica film on a flexible polymer substrate through pattern transfer and subsequent photocalcination

Hozumi

Kizuki

Inagaki

et al. 2006

Journal of Vacuum Science &Amp; Technology A: Vacuum, Surfaces, and Films

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A microfabrication method for mesoporous silica ͑MPS͒ film on a flexible polymer substrate is proposed. The method consists of three processes. First, by using a spatially defined microtemplate consisting of dual self-assembled monolayers ͑SAMs͒ with alternating trifluorocarbon ͑CF 3 ͒ and amino ͑NH 2 ͒ groups, a mesostructured silica/surfactant composite ͑MSSC͒ film was site-selectively deposited on the CF 3 -terminated SAM regions through hydrophobic and van der Waals interactions between the surfactant molecules and the hydrophobic SAM surface. Next, in order to transfer these prefabricated MSSC micropatterns to a poly͑ethyleneterephthalate͒ ͑PET͒ substrate, the sample was pressed firmly against the PET surface for 60 min at 90°C under a pressure of 4 MPa. Due to the weak adhesion between the MSSC film and the CF 3 -terminated SAM surface, the deposited MSSC micropatterns readily peeled off the SAM surface and were transferred to the PET substrate while preserving both the morphology and the nanostructures of the micropatterns, as evidenced by atomic force microscopy ͑AFM͒, scanning electron microscopy, energy dispersion x-ray spectroscopy, and x-ray diffractometry ͑XRD͒. Finally, to remove the surfactant molecules and obtain well-defined nanopores, a photochemical approach, known as "photocalcination," using UV light of 185 and 254 nm wavelengths was employed. Fourier transform infrared spectroscopy XRD, and AFM confirmed that the surfactant molecules were completely eliminated from the MSSC micropatterns without distorting either their finely patterned microstructures or their well-ordered periodic nanostructures. Through this technique, well-shaped 5 m wide MPS micropatterns were fabricated on the flexible PET substrates. These embedded MPS micropatterns adhered tightly to the PET substrates and no peeling was observed in a Scotch® tape peeling test.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fabrication of micropatterned mesoporous silica film on a flexible polymer substrate through pattern transfer and subsequent photocalcination

Hozumi

Kizuki

Inagaki

et al. 2006

Journal of Vacuum Science &Amp; Technology A: Vacuum, Surfaces, and Films

View full text Add to dashboard Cite

show abstract

“…All the results discussed below are based on printed silica–surfactant micro‐ and macropatterns. Samples were not calcined or extracted, although as we mention later and in the Experimental Section, we can extract the surfactant using the UV/ozone calcination process reported previously 30, 36, 37. Patterns were created using computer‐aided design software.…”

Section: Resultsmentioning

confidence: 99%

“…Several microfabrication techniques, such as surface‐regulated growth,19, 22, 23 lithographic micromolding,24–29 and optical lithography18, 30 have been reported for micropatterning of mesostructured materials. However, most of these lithographic processes are complicated and require flat substrates (e.g., silicon, silica, and mica) 18, 19, 21–30. Recently, mesostructured silica micropatterns on polymer substrates have been reported through transferring the prefabricated micropatterns from a silicon substrate to a polymeric substrate;31 however, it still requires several complicated steps 31.…”

Section: Introductionmentioning

confidence: 99%

Directed Aerosol Writing of Ordered Silica Nanostructures on Arbitrary Surfaces with Self‐Assembling Inks

Pang

Stuecker

Jiang

et al. 2008

Small

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This paper reports the fabrication of micro- and macropatterns of ordered mesostructured silica on arbitrary flat and curved surfaces using a facile robot-directed aerosol printing process. Starting with a homogenous solution of soluble silica, ethanol, water, and surfactant as a self-assembling ink, a columnated stream of aerosol droplets is directed to the substrate surface. For deposition at room temperature droplet coalescence on the substrates and attendant solvent evaporation result in continuous, highly ordered mesophases. The pattern profiles are varied by changing any number of printing parameters such as material deposition rate, printing speed, and aerosol-head temperature. Increasing the aerosol temperature results in a decrease of the mesostructure ordering, since faster solvent evaporation and enhanced silica condensation at higher temperatures kinetically impede the molecular assembly process. This facile technique provides powerful control of the printed materials at both the nanoscale and microscale through chemical self-assembly and robotic engineering, respectively.

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“…To address this, the authors have recently studied the use of mesoporous silica thin films deposited on silicon substrates for SALDI-MS characterization of small molecules [49]. The mesoporous films, prepared by an evaporation-induced self-assembly process [50] and subsequent UV exposure [51] are simple to produce, require no special handling or storage and are stable at ambient laboratory conditions for at least several months. The authors have observed mass spectra of several low-molecular-weight molecules desorbed from mesoporous silica films without added matrix.…”

Section: Sol-gel Filmsmentioning

confidence: 99%

Surface-assisted laser desorption/ionization mass spectrometry

Dattelbaum

Iyer

2006

Expert Review of Proteomics

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Laser desorption/ionization mass spectrometry (MS) is rapidly growing in popularity as an analytical characterization method in several fields. The technique shot to prominence using matrix-assisted desorption/ionization for large biomolecules (>700 Da), such as proteins, peptides and nucleic acids. However, because the matrix, which consists of small organic molecules, is also ionized, the technique is of limited use in the low-molecular-mass range (<700 Da). Recent advances in surface science have facilitated the development of matrix-free laser desorption/ionization MS approaches, which are referred to here as surface-assisted laser desorption/ionization (SALDI) MS. In contrast to traditional matrix-assisted techniques, the materials used for SALDI-MS are not ionized, which expands the usefulness of this technique to small-molecule analyses. This review discusses the current status of SALDI-MS as a standard analytical technique, with an emphasis on potential applications in proteomics.

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Photochemical Pattern Transfer and Enhancement of Thin Film Silica Mesophases

Cited by 45 publications

References 27 publications

Fabrication of micropatterned mesoporous silica film on a flexible polymer substrate through pattern transfer and subsequent photocalcination

Fabrication of micropatterned mesoporous silica film on a flexible polymer substrate through pattern transfer and subsequent photocalcination

Directed Aerosol Writing of Ordered Silica Nanostructures on Arbitrary Surfaces with Self‐Assembling Inks

Surface-assisted laser desorption/ionization mass spectrometry

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