PMID- 36200443
OWN - NLM
STAT- MEDLINE
DCOM- 20221021
LR  - 20221021
IS  - 1744-6848 (Electronic)
IS  - 1744-683X (Linking)
VI  - 18
IP  - 40
DP  - 2022 Oct 19
TI  - Liquid crystal droplet design by using pseudopeptidic bottlebrush polymer 
      additives.
PG  - 7838-7849
LID - 10.1039/d2sm00953f [doi]
AB  - Liquid crystal (LC) droplets are promising candidates for sensing applications 
      due to their high sensitivity to surface anchoring changes, resulting in readily 
      detectable optical effects. Herein, we have designed and synthesized amino 
      acid-based bottlebrush polymers and investigated their impact on LC director 
      configurations in the droplets. The pseudopeptidic bottlebrush polymers with an 
      aromatic (phenyl) and aliphatic appendages are synthesized using ring-opening 
      metathesis polymerization (ROMP). Polymer dispersed liquid crystal (PDLC) samples 
      are prepared by employing pseudopeptidic bottlebrush polymers and 
      4-cyano-4'-pentylbiphenyl (5CB) LC via solvent-induced phase separation (SIPS) 
      technique. Due to pi-pi stacking, the phenyl group favours radial configuration, 
      whereas the repulsion between 5CB and aliphatic groups induces molecular 
      alignment leading to bipolar droplet arrangement. The impact of various pendant 
      groups attached to the polymer on the prepared PDLC sample's surface 
      characteristics and free energy components is illustrated. The sensing capability 
      of 5CB dispersed in pseudopeptidic bottlebrush polymers for various pH solutions 
      is investigated using polarizing optical microscopy (POM). The PDLC samples are 
      moderately permeable to water and sensitive to different pH solutions. The 
      results demonstrate a simplified and straightforward approach for preparing 
      LC-based biosensors and chemical sensors.
FAU - Kumari, Asha
AU  - Kumari A
AUID- ORCID: 0000-0001-8003-1461
AD  - Department of Physics, Indian Institute of Technology Delhi, Hauz Khas, New 
      Delhi, 110016, India. aloka.sinha@physics.iitd.ac.in.
FAU - Singh, Hanuman
AU  - Singh H
AUID- ORCID: 0000-0002-9781-2827
AD  - Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New 
      Delhi, 110016, India. haridasv@chemistry.iitd.ac.in.
FAU - Dhawan, Sameer
AU  - Dhawan S
AUID- ORCID: 0000-0001-8957-9757
AD  - Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New 
      Delhi, 110016, India. haridasv@chemistry.iitd.ac.in.
FAU - Bhardwaj, Surya Kant
AU  - Bhardwaj SK
AD  - Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New 
      Delhi, 110016, India. haridasv@chemistry.iitd.ac.in.
FAU - Haridas, V
AU  - Haridas V
AUID- ORCID: 0000-0002-2931-0585
AD  - Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New 
      Delhi, 110016, India. haridasv@chemistry.iitd.ac.in.
FAU - Sinha, Aloka
AU  - Sinha A
AUID- ORCID: 0000-0003-4875-6395
AD  - Department of Physics, Indian Institute of Technology Delhi, Hauz Khas, New 
      Delhi, 110016, India. aloka.sinha@physics.iitd.ac.in.
LA  - eng
PT  - Journal Article
DEP - 20221019
PL  - England
TA  - Soft Matter
JT  - Soft matter
JID - 101295070
RN  - 0 (Polymers)
RN  - 40817-08-1 (4-cyano-4'-pentylbiphenyl)
RN  - 059QF0KO0R (Water)
RN  - 0 (Solvents)
RN  - 0 (Amino Acids)
SB  - IM
MH  - *Liquid Crystals/chemistry
MH  - Polymers/chemistry
MH  - Water/chemistry
MH  - Solvents
MH  - Amino Acids
EDAT- 2022/10/07 06:00
MHDA- 2022/10/22 06:00
CRDT- 2022/10/06 05:02
PHST- 2022/10/07 06:00 [pubmed]
PHST- 2022/10/22 06:00 [medline]
PHST- 2022/10/06 05:02 [entrez]
AID - 10.1039/d2sm00953f [doi]
PST - epublish
SO  - Soft Matter. 2022 Oct 19;18(40):7838-7849. doi: 10.1039/d2sm00953f.