Superbright) is employed for data collection in c

Superbright) is employed for data collection in
combination with the algorithm, a final data quality
comparable to that of a third generation synchrotron can
be achieved.56 The application of the algorithm allows the
deconvolution of the source function (describing the
primary beam with its size and divergence) from the
measurement and the restoration, at least partially, of
missing data cut away by the beam stopper, making
hidden features in the GISAXS pattern become visible.
For this reason the algorithm has been named 'RESTOREDATA'.
A suitable test sample was chosen for this study,
comprised by octapod-shaped nanocrystals57,58 which
have been self-assembled in 2D square lattices on the
surface of a silicon substrate. The octapods consist of a
CdSe core from which eight CdS pods depart according
to an octahedral symmetry. TEM and SEM pictures,
together with schemes of the octapods and their
assemblies, are reported in Figure 8.

http://cdn.intechopen.com/public/docs/selecte...s_nano.pdf

Figure 8. (a) TEM) image of the “unassembled” octapods, deposited on a standard TEM grid. Sketch of an octapod as viewed in two
different projections. (b) Sketch of a 2D square lattice of side-to-side aligned octapods, each of them touching the substrate with four
pods, as clearly shown by the tilted SEM, inset. In (c) and (d) can be seen SEM images of the actual 2D square lattices of octapods, from
the same sample as that shown in (b), at two different magnifications [Reproduced with the permission of the International Union of
Crystallography (http://journals.iucr.org/) from L. De Caro, D. Altamura, F. A. Vittoria, G. Carbone, F. Qiao, L. Manna & C. Giannini, “A
superbright X-ray laboratory micro-source empowered by a novel restoration algorithm”, J. Appl. Cryst. vol. 45, pp. 869−873, 2012].

The self-assembly of colloidal CdSe/CdS nanorods (NRs)
at the liquid/air interface was studied by combining timeresolved
in situ GISAXS and ex situ Fast Fourier
Transform TEM (FFT-TEM). The method79 used for the
chemical synthesis of CdSe/CdS dot core/rod shell NRs,
allows for control over the length of the NRs by tuning
the CdSe seed concentration and by adjusting the
temperature and reaction time. The process of the NRs'
self-assembly was studied by in situ GISAXS on three
different bathes of NRs with variable narrow size
distribution so as to follows the dynamics of NR selfassembly
(long NRs with length L = (48 ± 4) nm and
diameter 2R = (4.1 ± 0.4) nm, (ii) medium-length NR with
L = (22.2 ± 2.3) nm and 2R = (6.3 ± 1.0) nm, and (iii) short
NRs with L = (16.3 ± 2.4) nm and 2R = (3.4 ± 0.3) nm). The
experiment was performed at a synchrotron beamline
with an incident X-ray energy of 13.3 KeV at a grazing
incidence angle of αi = 0.061° so that the beam only probes
the toluene/air interface at most 10/20 nm deep into the
NRs dispersion.

Assembled Nanostructured
Architectures Studied by Grazing
Incidence X-Ray Scattering
Invited Review Article
Davide Altamura1, Teresa Sibillano1, Dritan Siliqi1, Liberato De Caro1 and Cinzia Giannini1,*
1 Istituto di Cristallografia, Sede di Bari, Bari, Italy
* Corresponding author: cinzia.giannini@ic.cnr.it

Just in case anyone asks, we are there!!!!