Multicolor Emission on Prepatterned Substrates Using a Single Dye Species

Abstract

A new strategy for realizing patterned surfaces with different emission colors is demonstrated. This approach relies on the gas‐phase deposition of dye molecules onto solid substrates that are prepatterned by nanoimprint lithography (see figure). Only a single molecular species is involved. Thus, the observed color change and corresponding spectral shift in the emission properties depends on the substrate used and can be tuned by surface engineering.

Selective deposition of organic molecules onto DPPC templates – A molecular dynamics study

“…Current strategies to achieve large-area site-selective patterning usually involve various combinations of top-down and bottom-up methods, such as nanoimprinting [8] or microcontact printing (lCP) [9][10][11][12]. Within these approaches, the substrate surfaces are chemically modified to generate binding sites specific for the material to be patterned by tuning energetically and/or chemically properties of these areas (templated self-assembly).…”

Nanoimprint lithography and surface modification as prospective technologies for heterogeneous integration

“…Figure 4b Dye molecules stay in monomer state in some polymers because they can diffuse into the free volume of polymer bulk. For polymer substrates, the main factors to control the states of dye molecules include the size of dye molecules, size and distribution of free volumes, evaporation speed, storage time, solubility of polymer and "concentration" of dye in polymer [20]. By controlling these factors, the ratio of monomer emission and excimer emission can be tuned.…”

“…glass or quartz, will often cause a spectral shift owing to the formation of aggregates. To create site-selective multicolour patterns, a modified nanoimprint lithography process to obtain PDMS patterns on quartz substrates was used as well as two different light emitting molecules [19]. Here N, N'-di (n-butyl) quinacridone (DBQA), which is a derivative of QA, and second, 3-(9-anthrye) pyrazole (ANP) were used.…”

A new way of information storage using red, green, blue and black color imprints

“…Here again the primary focus was to find ways of having organized quantum dots so that the future prospects of using them in information storage could be supported. There have also been reports of development of newer materials and methods for imprinting patterns in color from various research laboratories (Vasilopoulou et al 2007;Jiang et al 2005;Hu et al 2007;Lezec et al 2007). However, none of these methods have really presented a realistic scheme of information storage and retrieval based on color coding.…”