We have investigated the influence of multiple scattering on the magnetic small-angle neutron sca... more We have investigated the influence of multiple scattering on the magnetic small-angle neutron scattering (SANS) from a Nd-Fe-B nanocrystalline magnet. We performed sample-thickness- and neutron-wavelength-dependent SANS measurements, and observed the scattering vector dependence of the multiple magnetic scattering. It is revealed that significant multiple scattering exists in the magnetic scattering rather than the nuclear scattering of Nd-Fe-B nanocrystalline magnet. It is considered that the mean free path of the neutrons for magnetic scattering is rather short in Nd-Fe-B magnets. We analysed the SANS data by the phenomenological magnetic correlation model considering the magnetic microstructures and obtained the microstructural parameters.
Lipophilic polyelectrolyte gels capable of large swelling in low-polar solvents (3 ≤ ε ≤ 10) were... more Lipophilic polyelectrolyte gels capable of large swelling in low-polar solvents (3 ≤ ε ≤ 10) were developed by Ono et al. (Nature Mater., 2007), where ε is the dielectric constant. These gels were prepared by introducing tetraphenylborate as a lipophilic anion (tetrakis(3,5-bis(trifluoromethyl)phenyl)-borate; TFPB-) and tetraalkylammonium with long alkyl chains as a lipophilic cation (tetra(n-butyl) ammonium; TBA+) into a poly (octadecyl acrylate) (pODA) backbone chain. Here, we investigated the structure of the lipophilic polyelectrolyte gels and corresponding polymer solutions in CH2Cl2 with small-angle neutron scattering (SANS) and dynamic light scattering (DLS). From SANS, it was revealed that individual pODA chain is regarded as a rod with the cross-section radius of 15 Å and the length of ca. 160 Å and is little changed by introduction of charges or cross-linking. In addition to this, it was revealed from SANS measurements that the second virial coefficient of pODA in CH2Cl2 w...
Journal of the Chemical Society Faraday Transactions, 1998
Page 1. Characterisation of a basal-plane-oriented graphite Elliot P. Gilbert,* Philip A. Reynold... more Page 1. Characterisation of a basal-plane-oriented graphite Elliot P. Gilbert,* Philip A. Reynolds and John W. White Research School of Chemistry, Australian National University, Canberra ACT 0200, Australia We have employed ...
Applied Physics a Materials Science Processing, 2002
Small angle scattering (SANS and SAXS) and differential scanning calorimetry have been measured f... more Small angle scattering (SANS and SAXS) and differential scanning calorimetry have been measured from C28:C36 normal paraffin mixtures of varying composition quenched from the melt. Satellite peaks are observed in the SAXS whose offset in Q, relative to Bragg diffraction peaks associated with the average structure, are composition dependent. The offset is close to the position of the most intense peak observed in SANS. Scattering from the quenched structures is consistent with a correlated displacement and substitutional disorder model yielding modulations that are incommensurate with the average lattice. DSC shows an additional endotherm in the mixtures that is not present in the pure components and is associated with this superstructure formation.
Journal of the Chemical Society, Faraday Transactions, 1998
Page 1. Characterisation of a basal-plane-oriented graphite Elliot P. Gilbert,* Philip A. Reynold... more Page 1. Characterisation of a basal-plane-oriented graphite Elliot P. Gilbert,* Philip A. Reynolds and John W. White Research School of Chemistry, Australian National University, Canberra ACT 0200, Australia We have employed ...
Page 1. Microphase separation kinetics in n-alkane mixtures Elliot P. Gilbert,*a Philip A. Reynol... more Page 1. Microphase separation kinetics in n-alkane mixtures Elliot P. Gilbert,*a Philip A. Reynolds,a Pappannan Thiyagarajan,b Denis G. Wozniakb and John W. Whitea a Research School of Chemistry, T he Australian National ...
We have investigated the influence of multiple scattering on the magnetic small-angle neutron sca... more We have investigated the influence of multiple scattering on the magnetic small-angle neutron scattering (SANS) from a Nd-Fe-B nanocrystalline magnet. We performed sample-thickness- and neutron-wavelength-dependent SANS measurements, and observed the scattering vector dependence of the multiple magnetic scattering. It is revealed that significant multiple scattering exists in the magnetic scattering rather than the nuclear scattering of Nd-Fe-B nanocrystalline magnet. It is considered that the mean free path of the neutrons for magnetic scattering is rather short in Nd-Fe-B magnets. We analysed the SANS data by the phenomenological magnetic correlation model considering the magnetic microstructures and obtained the microstructural parameters.
Lipophilic polyelectrolyte gels capable of large swelling in low-polar solvents (3 ≤ ε ≤ 10) were... more Lipophilic polyelectrolyte gels capable of large swelling in low-polar solvents (3 ≤ ε ≤ 10) were developed by Ono et al. (Nature Mater., 2007), where ε is the dielectric constant. These gels were prepared by introducing tetraphenylborate as a lipophilic anion (tetrakis(3,5-bis(trifluoromethyl)phenyl)-borate; TFPB-) and tetraalkylammonium with long alkyl chains as a lipophilic cation (tetra(n-butyl) ammonium; TBA+) into a poly (octadecyl acrylate) (pODA) backbone chain. Here, we investigated the structure of the lipophilic polyelectrolyte gels and corresponding polymer solutions in CH2Cl2 with small-angle neutron scattering (SANS) and dynamic light scattering (DLS). From SANS, it was revealed that individual pODA chain is regarded as a rod with the cross-section radius of 15 Å and the length of ca. 160 Å and is little changed by introduction of charges or cross-linking. In addition to this, it was revealed from SANS measurements that the second virial coefficient of pODA in CH2Cl2 w...
Journal of the Chemical Society Faraday Transactions, 1998
Page 1. Characterisation of a basal-plane-oriented graphite Elliot P. Gilbert,* Philip A. Reynold... more Page 1. Characterisation of a basal-plane-oriented graphite Elliot P. Gilbert,* Philip A. Reynolds and John W. White Research School of Chemistry, Australian National University, Canberra ACT 0200, Australia We have employed ...
Applied Physics a Materials Science Processing, 2002
Small angle scattering (SANS and SAXS) and differential scanning calorimetry have been measured f... more Small angle scattering (SANS and SAXS) and differential scanning calorimetry have been measured from C28:C36 normal paraffin mixtures of varying composition quenched from the melt. Satellite peaks are observed in the SAXS whose offset in Q, relative to Bragg diffraction peaks associated with the average structure, are composition dependent. The offset is close to the position of the most intense peak observed in SANS. Scattering from the quenched structures is consistent with a correlated displacement and substitutional disorder model yielding modulations that are incommensurate with the average lattice. DSC shows an additional endotherm in the mixtures that is not present in the pure components and is associated with this superstructure formation.
Journal of the Chemical Society, Faraday Transactions, 1998
Page 1. Characterisation of a basal-plane-oriented graphite Elliot P. Gilbert,* Philip A. Reynold... more Page 1. Characterisation of a basal-plane-oriented graphite Elliot P. Gilbert,* Philip A. Reynolds and John W. White Research School of Chemistry, Australian National University, Canberra ACT 0200, Australia We have employed ...
Page 1. Microphase separation kinetics in n-alkane mixtures Elliot P. Gilbert,*a Philip A. Reynol... more Page 1. Microphase separation kinetics in n-alkane mixtures Elliot P. Gilbert,*a Philip A. Reynolds,a Pappannan Thiyagarajan,b Denis G. Wozniakb and John W. Whitea a Research School of Chemistry, T he Australian National ...
Uploads
Papers by Elliot Gilbert