Crystal Palace ended their recent good form with a 2-1 defeat at home to Brentford.

Liquid crystals are substances that flow like a liquid but maintain some of the ordered structure of crystals. Liquid-crystal molecules tend to be elongated and to orient in specific directions.

Department of Chemistry, Sogang University, Seoul 04107, Republic of Korea ...

School of Chemistry, University of Bristol, Bristol BS8 1TS, U.K.