Hao Zhang et al 1999 J. Phys.: Condens. Matter 11 2035 doi:10.1088/0953-8984/11/8/016
Infrared spectra of nanometre granular zirconia
Hao Zhang
, Yulong Liu, Ke Zhu, Gueigu Siu
, Yonghong Xiong§ and Caoshui Xiong§
High-quality Fourier-transform infrared reflectance spectra of nanometre 
grains with particle sizes ranging from 5 nm to 120 nm have been recorded at room temperature. The results show that, even for very small grain sizes (5-10 nm), the samples retain the main features of monoclinic symmetry, although the lowering of the crystal symmetry has led to the broadening of the infrared bands. Two surface phonons have been identified. The processes of strain removal above the 
annealing temperature have been revealed by the appearance of two doublets at around 
and 
; at the same time the particle sizes increase rapidly. As the particle size decreases, the doubly degenerate infrared-active modes, such as 
at 
, redshift while the non-degenerate modes, such as 
at 
, blueshift. This phenomenon is tentatively explained in terms of the internal-external classification of the lattice vibrations.
- PACS
-
61.46.-w Structure of nanoscale materials
63.22.-m Phonons or vibrational states in low-dimensional structures and nanoscale materials
- Subjects
- Dates
-
Issue 8 (1 March 1999)
Received 10 August 1998, in final form 24 November 1998
-
Infrared spectra of nanometre granular zirconia
Hao Zhang et al 1999 J. Phys.: Condens. Matter 11 2035
-
Scaled-energy spectroscopy of strontium M = 0 Rydberg atoms in an electric field
X J Liu et al 2002 J. Phys. B: At. Mol. Opt. Phys. 35 2069
-
Investigations of the disturbed layer of ground quartz
G D Rieck and K Koopmans 1964 Br. J. Appl. Phys. 15 419
-
Control of dynamic Hopf bifurcations
N Berglund 2000 Nonlinearity 13 225
-
K and L X-ray excitation in very-heavy-ion-atom collisions near K-L level matching
A Warczak et al 1983 J. Phys. B: At. Mol. Phys. 16 1575
-
Merger of the UK National Radiological Protection Board with the Health Protection Agency
John Cooper and Parvaiz Ali 2005 J. Radiol. Prot. 25 221
-
Canonical strangeness and distillation effects in hadron production
V D Toneev and A S Parvan 2005 J. Phys. G: Nucl. Part. Phys. 31 583
-
Size-dependent optical properties and carriers dynamics in CdSe/ZnS quantum dots
Ma Hong et al 2008 Chinese Phys. B 17 1280
-
Diffusion by anti-structure defects in non-stoichiometric intermetallic compounds with B2 and
structures
S V Divinski and L N Larikov 1997 J. Phys.: Condens. Matter 9 7873
-
Half-metallic ferromagnets. II. Transport properties of NiMnSb and related inter-metallic compounds
M J Otto et al 1989 J. Phys.: Condens. Matter 1 2351
Related review articles
What's this?- Dewetting-mediated pattern formation in nanoparticle assemblies
- Magnetic surface nanostructures
- Growth mechanisms for doped clusters