From the measurements the hydrodynamic radius of GMP molecule has been estimated as r H = 5.4 Å. It was attributed to the translational diffusion coefficient of the stacks of G-quartets in a range of high concentration and to the stacks of GMP monomer associates for low concentration (less than 40 mg/mL). One relaxation process with distinct amplitude was observed, as a function of temperature and sample concentration. Therefore, in this paper we have studied the structures formed by specific association of guanosine 5′-monophosphate (GMP) nucleotide molecules in water solutions by photon correlation spectroscopy and depolarized Rayleigh light scattering. G-wires and related structures seem to be an excellent material of biological origin for nanostructures. G-quadruplexes are present in many sites of the human genome, can inhibit telomerase, and can be used as drug delivery supramolecules. Thisĭuring the past decade, from the vast evidence it became clear that DNA oligomers rich in guanine stretches can form in solution highly ordered forms called G-quadruplexes and G-wires. In the intermediate surfactant concentration regime, two types of copolymer-surfactant complexes coexist, one large copolymer-rich complex and one small complex consisting of one or a few copolymer chains and rich in surfactant. The relaxation time distributions from dynamic light scattering are monomodal and the electrostatic interaction is evidenced in both the static and the dynamic light scattering results. At low surfactant concentrations (<1-2 mM), single surfactant molecules associate with the copolymer micelle forming a large copolymer-rich complex that becomes increasingly charged. When ionic surfactants are added to the PEO-PPO-PEO block copolymer micellar systems, three concentration regimes are observed in the results from the complementary experimental techniques. The different copolymer/surfactant systems have been investigated at a constant copolymer concentration of 1 wt % and with varying surfactant concentration up to about 120 mM. At 40 ☌, the copolymers are associated into micelles with hydrodynamic radius of 9.8 nm (P123) and 12.5 nm (F127) composed of a hydrophobic PPO core and a water-swollen PEO corona. The studied copolymers (denoted P123 and F127) have the same hydrophobic PPO central block (m) 68), but different length of the endblocks, n) 20 and 97. Properties of nonionic triblock copolymers of poly(ethylene oxide) (PEO) and poly(propylene oxide) (PPO) (EOnPOmEOn) in aqueous solution and their interaction with the ionic surfactants sodium dodecyl sulfate and hexadecyltrimethylammonium chloride have been investigated by static and dynamic light scattering, high sensitivity differential scanning, and isothermal titration calorimetry. In a more general context LSI can be considered a simplified version of the dynamic light scattering (DLS) approach, which analyzes the temporal intensity fluctuations of scattered 1 It is widely used in biomedical imaging of blood flow 1–5 since it provides access to physiological processes in vivo with excellent temporal and spatial resolution. © 2008 Optical Society of America Laser speckle imaging (LSI) is an efficient and simple method for full-field monitoring of dynamics in heterogeneous media. We present a refined processing scheme that allows a correct estimation of the relaxation time from LSI data. The presence of a non-fluctuating component of scattered light results in the significant increase in the measured image contrast and complicates the estimation of the relaxation time. Multiple scattering leads to blurring of the dynamic inhomogeneity as detected by LSI. We show for the case of a liquid inclusion that the spatial resolution and the signal itself are both significantly affected by scattering from the turbid environment. We have analyzed the image formation and dynamic properties in laser speckle imaging (LSI) both experimentally and with Monte-Carlo simulation.