Use of the photoacoustic spectroscopy in the investigation of the dilution process in surface-coated nanoparticles

Use of the photoacoustic spectroscopy for characterization of magnetic fluid based on mamona oil

“…In the nanometer range differences in average particle size obtained from different techniques are very often and may reflect the approximations used to analyze the data or else may reflect differences regarding the quality of the data. associated to macromolecules [1][2][3]. As can be observed in Figure 3 the S-band associated to the three MF samples are similar and quite different from the S-band of the purified mamona oil.…”

“…This paper reports on the use of the photoacoustic spectroscopy (PAS) in the characterization of magnetic fluid samples based on mamona oil (ricinus communis L.) as the carrier fluid. The macroscopic properties of MF samples are largely affected by its microscopic structure, including here the particle-particle interaction and the interaction between the suspended particle and the molecules of the carrier fluid [1]. The very possibility of manipulation of MF samples (using gradients of magnetic fields) depends upon the above-mentioned interactions and is the basis of a huge variety of medical and industrial applications.…”

Fine structure of gold nanoparticles stabilized by buthyldithiol: Species identified by Mössbauer spectroscopy

“…The variable wavelength was provided by a 0.22 m double monochromator (Spex 1680) with 0.2 nm resolution at 500 nm. Samples were enclosed into a sealed, high-performance, PA cell at atmospheric pressure, coupled to a sensitive microphone [34]. 197 Au Mössbauer spectra were recorded at 4.2 K in a CryoVac cryostat with a built-in Wissel drive and control system using 197 Pt source [35].…”

“…Photoacoustic spectroscopy provides information on molecular species attached to the surface of nanoparticles [34]. Sorption and bonding of some indicator additives may enhance the appearance of signals [40].…”

Using Mössbauer spectroscopy as key technique in the investigation of nanosized magnetic particles for drug delivery

“…This paper is focused on the description of the basic characterization of magnetic nanoparticles used to built a whole family of DDS, namely biocompatible magnetic fluids, magnetoliposomes, biocompatible magnetic nanocapsules, and biocompatible magnetic nanoemulsions. Besides Mössbauer spectroscopy [1][2][3][4][5][6][7][8][9][10] other techniques used to characterize the above-mentioned magnetic DDS include those related to the morphological/crystalline aspects [11][12][13][14][15][16][17], the magnetic and magnetooptical response to DC/AC magnetic fields [18][19][20][21][22][23][24][25], and visible/microwave excitation [26][27][28][29][30][31][32]. Applications of the l-DDS discussed in this paper include cell-labeling [33][34][35], photodynamic therapy (PDT) [36][37][38][39][40], and magnetohyperthermia (MHT) of cancer cells and tissues [41][42][43][44].…”