PMID- 27878180
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20180717
LR  - 20180717
IS  - 2040-3372 (Electronic)
IS  - 2040-3364 (Linking)
VI  - 8
IP  - 47
DP  - 2016 Dec 1
TI  - From evaporation-induced self-assembly to shear-induced alignment.
PG  - 19882-19893
AB  - The functionality of compact nanostructured thin films depends critically on the 
      degree of order and hence on the underlying ordering mechanisms during film 
      formation. For dip coating of rigid nanorods the counteracting mechanisms, 
      evaporation-induced self-assembly (EISA) and shear-induced alignment (SIA) have 
      recently been identified as competing ordering mechanisms. Here, we show how to 
      achieve highly ordered and homogeneous thin films by controlling EISA and SIA in 
      dip coating. Therefore we identify the influences of the process parameters 
      including temperature, initial volume fraction and nanorod aspect ratio on 
      evaporation-induced convective flow and externally applied shear forces and 
      evaluate the resulting films. The impact of evaporation and shear can be 
      distinguished by analysing film thickness, surface order and bulk order by 
      careful in situ SAXS, Raman and SEM-based image analysis. For the first time we 
      derive processing guidelines for the controlled application of EISA and SIA 
      towards highly ordered thin nematic films.
FAU - Srikantharajah, R
AU  - Srikantharajah R
AD  - Institute of Particle Technology, Friedrich-Alexander-Universitat 
      Erlangen-Nurnberg, Cauerstrasse 4, 91058 Erlangen, Germany. 
      wolfgang.peukert@fau.de.
FAU - Schindler, T
AU  - Schindler T
AD  - Chair for Crystallography and Structural Physics, Friedrich-Alexander-Universitat 
      Erlangen-Nurnberg, Staudtstrasse 3, 91058 Erlangen, Germany.
FAU - Landwehr, I
AU  - Landwehr I
AD  - Fraunhofer Institute for Manufacturing Engineering and Automation IPA, 
      Nobelstrasse 12, 70569 Stuttgart, Germany.
FAU - Romeis, S
AU  - Romeis S
AD  - Institute of Particle Technology, Friedrich-Alexander-Universitat 
      Erlangen-Nurnberg, Cauerstrasse 4, 91058 Erlangen, Germany. 
      wolfgang.peukert@fau.de.
FAU - Unruh, T
AU  - Unruh T
AD  - Chair for Crystallography and Structural Physics, Friedrich-Alexander-Universitat 
      Erlangen-Nurnberg, Staudtstrasse 3, 91058 Erlangen, Germany.
FAU - Peukert, W
AU  - Peukert W
AD  - Institute of Particle Technology, Friedrich-Alexander-Universitat 
      Erlangen-Nurnberg, Cauerstrasse 4, 91058 Erlangen, Germany. 
      wolfgang.peukert@fau.de.
LA  - eng
PT  - Journal Article
PL  - England
TA  - Nanoscale
JT  - Nanoscale
JID - 101525249
EDAT- 2016/11/24 06:00
MHDA- 2016/11/24 06:01
CRDT- 2016/11/24 06:00
PHST- 2016/11/24 06:00 [pubmed]
PHST- 2016/11/24 06:01 [medline]
PHST- 2016/11/24 06:00 [entrez]
AID - 10.1039/c6nr06586d [doi]
PST - ppublish
SO  - Nanoscale. 2016 Dec 1;8(47):19882-19893. doi: 10.1039/c6nr06586d.