Printing Processes

Taggi, Arthur J.; Walker, Peter

doi:10.1002/0471238961.1618091420010707.a01

Cited by 5 publications

(4 citation statements)

References 19 publications

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“…The commercial introduction of high power laser diodes in the middle of the 1980s opened the door to numerous new technical applications of cyanine dyes. Among their number were fluorescent probes for biomedical imaging, laser radiation absorbing dyes in CD‐R and DVD/R, and sensitisers in computer‐to‐plate (CtP) lithographic printing plates …”

Section: Introductionmentioning

confidence: 99%

Fine Structure in Electronic Spectra of Cyanine Dyes: Are Sub‐Bands Largely Determined by a Dominant Vibration or a Collection of Singly Excited Vibrations?

Mustroph

Towns²

2018

ChemPhysChem

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This work critically examines attempts to model the fine structure apparent in electronic spectra of cyanine dyes and their analogues. Numerous computational studies reported over the past decade attribute the origin of sub‐bands and their relative intensities to vibronic transitions in which the relevant electronic transition is coupled, irrespective of symmetry, with a collection of vibrations. It is contended that this type of approach is not supported by experimental evidence. An argument is reiterated for a more appropriate model that adheres closely to fundamental principles and fits the data. It stipulates that essentially just one symmetric vibration, carbon–carbon bond stretching of the cyanine polymethine chain, dominates the coupling and is responsible for the observed fine structure. Furthermore, it is pointed out that the intensities of the sub‐bands are readily explained by means of the Franck–Condon principle.

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Section: Introductionmentioning

confidence: 99%

Fine Structure in Electronic Spectra of Cyanine Dyes: Are Sub‐Bands Largely Determined by a Dominant Vibration or a Collection of Singly Excited Vibrations?

Mustroph

Towns²

2018

ChemPhysChem

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“…Surface patterning relies on a broad range of classical contactmediated techniques [1] such as screen and stencil printing, offset printing and electrophotography. For higher resolution, radiation-mediated patterning such as optical, UV, x-ray and e-beam lithographies are widely used.…”

Section: Introductionmentioning

confidence: 99%

Soft and rigid two-level microfluidic networks for patterning surfaces

Juncker

Schmid

Bernard

et al. 2001

J. Micromech. Microeng.

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We describe the microfabrication and use of elastomeric and rigid two-level microfluidic networks (µFNs), made of poly(dimethylsiloxane) (PDMS) or Si, for patterning surfaces. The first level corresponds to microchannels and the second to via holes through the µFNs serving as filling and venting ports. µFNs in PDMS are manufactured using a 'sandwich' replication from a microfabricated four inch mold structured with SU-8 photoresist, which is planarized by mechanical polishing. µFNs in Si are microfabricated using deep reactive ion etching. Both types of µFNs can be positioned onto a substrate, creating sealed microchannels, filled with different liquids, flushed, removed and reused. These two-level µFNs allow us to access the ports from the rear, minimize interchannel crosstalk, and are economic of solutions. The channels are made wettable so that the liquids can flow spontaneously into the conduits, but stop at the venting ports. The sealing of the conduits usually requires that either the µFN or the substrate be soft. A strategy for using hard two-level µFNs, in Si, for patterning hard substrates is presented: despite voids in-between the µFN and the substrate, a water-based solution can be guided by hydrophilic microchannels over a hydrophobic surface. Adjusting the wetting properties of the various surfaces is key to preventing undesired spreading of solutions. We illustrate our concepts by micromolding colored photocurable polymers on glass and patterning proteins as lines on a polystyrene surface.

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“…Early systems were designed to change physical properties, such as solubility for Riston [1] and Cyrel, [2] or adhesion (surface tack) for Cromalin. [3] The new optical photopolymers described here rely on change in optical properties, namely, bulk refractive index, with polymerization. In addition to changes in physical or optical properties these materials also rely on the ability to record precise microscopic patterns.…”

Section: Introductionmentioning

confidence: 99%