Here you will find details about the research activities developed by our group.
The Optics and Nanoscopy Group (GON) was founded in 2014 and is a research group part of the Post-graduate Programs in PHYSICS (CAPES grade 5 ) and in MATERIALS (CAPES grade 4) of the Federal University of Alagoas.
We are always interested in hearing from fellow scientists wishing to work with us or potential students wishing to study with us.
Exploring the limits of physical resolution and understanding the behavior and properties of materials at the nanoscale are the central aims of the research carried out....Read more
The GON develops several research activities involving the use of optics and lasers in the most diverse fields of knowledge. This field includes the study of...Read more
High quality large scale fabrication of cellular scaffolds, with three-dimensional resolution comparable to cell size, is an important task to enable applications...Read more
We specialize in state-of-the-art material characterization methodologies and techniques. The researches are conducted to evaluate the healthiness and reliability....Read more
Our lab for samples preparation is very well equipped: chemistry lab with two...Read more
Our Spectroscopy Facility offers a wide range of analytical instrumentation for...Read more
We have X-ray and SEM laboratories that are maintained as multi-user facilities...Read more
This lab provides a number of different scanning probe microscopy techniques...Read more
Scientific Reports 8 (1): 6370. 2018.
"We introduce a simple method to characterize the topological charge associated with the orbital angular momentum of a m-order elliptic light beam. This method consists in the observation of the far field pattern of the beam carrying orbital angular momentum, diffracted from a triangular aperture. We show numerically and experimentally, for Mathieu, Ince–Gaussian, and vortex Hermite–Gaussian beams, that only isosceles triangular apertures allow us to determine in a precise and direct way, the magnitude m of the order and the number..."
BBA General Subjects; 1862 (4): 816-824. 2018.
"Class 3 semaphorins are soluble proteins involved in cell adhesion and migration. Semaphorin-3A (Sema3A) was initially shown to be involved in neuronal guidance, and it has also been reported to be associated with immune disorders. Both Sema3A and its receptors are expressed by most immune cells, including monocytes, macrophages, and lymphocytes, and these proteins regulate cell function. Here, we studied the correlation between Sema3A-induced changes in biophysical parameters of thymocytes, and the subsequent repercussions on cell function....."
Applied Optics 57 (12): 3186-3190. 2018.
"We studied the free-space propagation of interfering partially coherent Bessel beams. The partially coherent superimposed Bessel beams were generated by diffracting a spatially incoherent light by two concentric circular slits. We observed a Talbot effect in the random intensity pattern and in the intensity correlation. We showed that the Talbot length depends only on the radii of the circular slits. We explained this effect on the basis of the plane-wave decomposition of spatially random fields....."
J Solid State Electrochem; 22 (5): 1483–1493. 2018.
"Thymol, a potent agent for microbial, fungal, and bacterial disease, has low aqueous solubility and it is genotoxic, i.e., is capable of damaging deoxyribonucleic acid (DNA). This possible problem of DNA toxicity needs to be solved to allow the use of different doses of thymol. This study characterized the inclusion compound containing thymol and β-cyclodextrin (β-CD) by measuring the interaction between these two components and the ability of thymol to bind DNA in its free and β-CD complexed form. The encapsulation..."
Scientific Reports; 8 (1): 536, 2018.
"Recently new methodologies for imaging have been achieved making use of multiple light scattering. Here we present the self-healing effect using a speckled light field. We present an experiment that constitutes a useful application for a three-dimensional light sheet-based imaging system through an inhomogeneous medium. Each layer can be imaged independently of the others. The axial resolution basically depends on the coherence length, which can be sub-wavelength and controllable. This allows for a simple and direct technique for...."