Abstract
Phase sensitive second harmonic generation (PS-SHG) was applied to investigate the effect of polar surface recognition of dye molecules (amaranth and sunset yellow, as well as dimethylaminostyryl-pyridine) in symmetry related sectors of host lattices such as KH 2PO 4 and phthalic acid, respectively. PS-SHG revealed bi-polar states in all cases, meaning that sectors growing in opposite directions feature opposite absolute polarities. Scanning pyroelectric microscopy demonstrated that the dipole moments of amaranth in KH 2PO 4 are pointing towards the growing crystal face. The present work reveals symmetry breaking through anomalous mixed crystal growth to produce physical properties associated with polar axes.
Original language | English (US) |
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Pages (from-to) | 4391-4395 |
Number of pages | 5 |
Journal | CrystEngComm |
Volume | 14 |
Issue number | 13 |
DOIs | |
State | Published - Jul 7 2012 |
ASJC Scopus subject areas
- Chemistry(all)
- Materials Science(all)
- Condensed Matter Physics