| 1. |
- Da, Silva A.F., et al.
(författare)
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Asymmetric nonlinear amplitude in patterns of porous silicon
- 2000
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Ingår i: Physica A. - 0378-4371 .- 1873-2119. ; 283:1, s. 223-227
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Tidskriftsartikel (refereegranskat)abstract
- A gradient pattern analysis is used to report a phenomenogical evidence of asymmetric nonlinear spatial distribution of porous silicon structures. We used a canonical sample set obtained from scanning force microscopy. Due to the high sensitivity of the gradient field operator, it is possible to correlate the photoluminescence performance of porous silicon with different degree of asymmetries and spatial nonlinearity. A generalization of this new approach to quantify nonlinear amplitude fragmentation in complex lattices is proposed.
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| 2. |
- Ahuja, Rajeev, et al.
(författare)
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Electronic and optical properties of lead iodide
- 2002
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Ingår i: Journal of Applied Physics. - : AIP Publishing. - 0021-8979 .- 1089-7550. ; 92:12, s. 7219-7224
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Tidskriftsartikel (refereegranskat)abstract
- The electronic properties and the optical absorption of lead iodide (PbI2) have been investigated experimentally by means of optical absorption and spectroscopic ellipsometry, and theoretically by a full-potential linear muffin-tin-orbital method. PbI2 has been recognized as a very promising detector material with a large technological applicability. Its band-gap energy as a function of temperature has also been measured by optical absorption. The temperature dependence has been fitted by two different relations, and a discussion of these fittings is given.
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| 3. |
- Aydin, Denis, et al.
(författare)
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Mobile phone use and brain tumors in children and adolescents: a multicenter case-control study.
- 2011
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Ingår i: Journal of the National Cancer Institute. - : Oxford University Press (OUP). - 1460-2105 .- 0027-8874. ; 103:16, s. 1264-76
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Tidskriftsartikel (refereegranskat)abstract
- It has been hypothesized that children and adolescents might be more vulnerable to possible health effects from mobile phone exposure than adults. We investigated whether mobile phone use is associated with brain tumor risk among children and adolescents.
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| 4. |
- Baroni, Mpma, et al.
(författare)
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Modeling and gradient pattern analysis of irregular SFM structures of porous silicon
- 2006
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Ingår i: Microelectronics Journal. - : Elsevier BV. - 0026-2692. ; 37:4, s. 290-294
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Tidskriftsartikel (refereegranskat)abstract
- Technological applications in opto-electronic devices have increased the interest in characterizing porous silicon structure patterns. Due to its physical properties, solutions from KPZ 2D are adopted to simulate the structure of porous material interface whose spatial characteristics are equivalent to those found in porous silicon samples. The analysis of the simulated and real scanning Force Microscopy (SFM) surfaces was done using the Gradient Pattern Analysis (GPA). We found that the KPZ 2D model presented asymmetry levels compatible with the irregular surfaces observed by means of SFM images of pi-Si.
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| 5. |
- Ferreira, Da Silva A., et al.
(författare)
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Characterization of asymmetric fragmentation patterns in SFM images of porous silicon
- 2000
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Ingår i: Solid State Communications. - 0038-1098 .- 1879-2766. ; 113:12, s. 703-708
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Tidskriftsartikel (refereegranskat)abstract
- Due to possible technological applications in opto-electronic devices, the interest in characterizing porous silicon structure patterns has recently increased. From scanning force microscopy (SFM) we have obtained images of different samples of porous silicon and applied pattern characterization operators on these matrices. In this paper, asymmetric spatial fragmentation in amplitude envelopes of porous silicon samples are characterized by means of a parameter that quantifies the amount of spatial asymmetry in the gradient field. The results show that this method is well suited to characterize silicon porosity quantitatively.
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| 6. |
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