An error occurred while processing the template. 
The following has evaluated to null or missing:
==> link_to_page.getData()?eval.name  [in template "20155#20195#RIBBON" at line 15, column 45]

----
Tip: It's the step after the last dot that caused this error, not those before it.
----
Tip: If the failing expression is known to legally refer to something that's sometimes null or missing, either specify a default value like myOptionalVar!myDefault, or use <#if myOptionalVar??>when-present<#else>when-missing</#if>. (These only cover the last step of the expression; to cover the whole expression, use parenthesis: (myOptionalVar.foo)!myDefault, (myOptionalVar.foo)??
----

----
FTL stack trace ("~" means nesting-related):
	- Failed at: #assign linkLabel = 'aria-label="' + ...  [in template "20155#20195#RIBBON" at line 15, column 9]
----
1<#assign contentId = .vars['reserved-article-id'].data > 
2<#assign ribbonClass = "ribbon${contentId}" > 
3<#assign bgColor = '' > 
4<#assign ribbonImage = image.getData() > 
5 
6<#assign layout = themeDisplay.getLayout()> 
7<#assign bgColor = getFieldValueFromLayoutTree(layout, "bgColor")> 
8<#assign linkLabel = ''> 
9 
10<#if validator.isBlank(ribbonImage)> 
11    <#assign ribbonImageUrl = '' > 
12<#else> 
13    <#assign ribbonImageUrl = link_to_page.getFriendlyUrl() > 
14    <#if link_to_page.getData()?has_content> 
15        <#assign linkLabel = 'aria-label="'+link_to_page.getData()?eval.name?replace('"','&quot;') + '"'> 
16    </#if> 
17</#if> 
18 
19<#if validator.isBlank(ribbonImage) > 
20    <#assign ribbonImage = getFieldValueFromLayoutTree(layout, "ribbonImage") > 
21 
22    <#if ribbonImage?has_content> 
23        <#assign ribbonImageUrl = getFieldValueFromLayoutTree(layout, "ribbonImageUrl") > 
24    </#if> 
25</#if> 
26<#if (parentStructureFieldSet20570.sourceFieldSet.source.getData())?has_content> 
27	<#assign source = parentStructureFieldSet20570.sourceFieldSet/> 
28	<#assign poster = parentStructureFieldSet20570.poster /> 
29	<#assign hideControls = parentStructureFieldSet20570.hideControls /> 
30</#if> 
31 
32 
33 
34 
35<style> 
36 
37    .${ribbonClass} .ribbon-content { 
38        aspect-ratio: 1170/${height.getData()}; 
39        background-image: url('${ribbonImage}'); 
40    } 
41 
42</style> 
43 
44<div class="hidden-phone ${ribbonClass} empa-background-color ${bgColor}"> 
45    <div class="container-xl"> 
46 
47        <#if !validator.isBlank(ribbonImageUrl)> 
48    <a href="${ribbonImageUrl}" ${linkLabel} 
49    <#else> 
50        <div 
51                </#if> 
52 
53                class="ribbon-content"> 
54            <#if source??> 
55                <#include "${templatesPath}/VIDEO-GENERIC" /> 
56            <#else> 
57                <div class="ribbon-overlay-text"> 
58                    ${overlay_text.getData()} 
59                </div> 
60            </#if> 
61 
62            <#if !validator.isBlank(ribbonImageUrl)> 
63            </a> 
64            <#else> 
65        </div> 
66        </#if> 
67    </div> 
68 
69</div> 
70 
71<#function getFieldValueFromLayoutTree layout fieldName> 
72     
73    <#attempt> 
74        <#local expandoValue = layout.getExpandoBridge().getAttribute(fieldName) /> 
75 
76        <#if (!(expandoValue?has_content) && !layout.isRootLayout())> 
77            <#return getFieldValueFromLayoutTree(layout.getAncestors()[0], fieldName)> 
78        </#if> 
79 
80        <#if expandoValue?has_content> 
81            <#return expandoValue[0]!""> 
82        <#else> 
83            <#return "" /> 
84        </#if> 
85    <#recover> 
86        <#return "" /> 
87    </#attempt> 
88 
89</#function> 

Thin Film Single Crystals

In areas where fast charge transport is a desired property, organic electronics currently relies on vapor deposited materials with few grain boundaries and high molecular order. Immense research efforts are made to understand the formation of single crystalline organic materials from solution processed films. We show that from dewetted cyanine dye films, single crystals can be grown by solvent vapor annealing. The crystals can be aligned along an energy pattern on the substrate.

 

Figure: Single crystals grow from dewetted film morphologies. The single crystals align along stripes of self-assembled monolayers. Reprinted with permission from ACS Nano 2013, 7, 5506. Copyright 2013 American Chemical Society.

Reference:
J.-N. Tisserant et al., Growth and Alignment of Thin Film Organic Single Crystals from Dewetting Patterns, ACS Nano 2013, 7, 5506-5513.

 

Funding:

SNF: Spacial and Morphological Control of Cyanine Dye Crystals

http://p3.snf.ch/project-152909

SNF: Structured Templates for Dye Aggregation and Crystallization for Applications in Photovoltaics and Photonics

http://p3.snf.ch/project-149127

 

Dr. Jakob Heier
Group leader

Phone: +41 58 765 4356

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