Sintering of nanoparticles of α-Fe2O3 using gelatin

Photoacoustic spectroscopy as a key technique in the investigation of nanosized magnetic particles for drug delivery systems

“…High-resolution microscopy provides direct observation of the nanoparticle shape, average size, size dispersion and spatial distribution in hosting matrices [7][8][9][10][11][12]. X-ray diffraction is the standard technique for probing the material's structural characteristics, providing also the average size of the nanosized particle via evaluation of the full width at half height of a characteristic diffraction line [12]. Different optical and magneto-optical techniques have been used to investigate nanosized magnetic particles either as a pure powder sample, suspended as a colloid, or dispersed in a hosting template.…”

“…This paper is focused on the description of the basic characterization of nanosized magnetic particles used to produce a whole family of MDDS. Besides photoacoustic spectroscopy [1][2][3][4][5][6] other techniques used to characterize the MDDS include those related to the morphological/crystalline aspects [7][8][9][10][11][12], the magnetic and magneto-optical * Tel. : +55 61 3272 3151; fax: +55 61 3273 6655.…”

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

“…Highresolution microscopy provides direct observation of the nanoparticle shape, average size, size dispersion and spatial distribution in hosting matrices [11][12][13][14][15][16][17]. X-ray diffraction is the standard technique for probing the material's structural characteristics, providing also the average size of the nanosized particle via evaluation of the full width at half height of a characteristic diffraction line [16]. Different optical and magneto-optical techniques have been used to investigate nanosized magnetic particles as a pure powder sample, suspended as a colloid, or dispersed in a hosting template.…”

“…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].…”

Preparação de pigmentos de aluminatos de cobalto para aplicação em vidrados cerâmicos

“…O processo de síntese abordado neste trabalho é um método relativamente novo e uma variação do método sol-gel no qual os precursores alcóxidos são substituídos por gelatina. Esse método apresenta a vantagem da gelatina ser um material de baixo custo e atóxico [7,8]. A gelatina tem várias cadeias de proteínas compostas de aminoácidos e estas podem se coordenar a íons metálicos através de sítios básicos (grupo amina e carboxila) a partir destas grandes cadeias [9], sendo esse processo uma nova alternativa Caracterização dos pigmentos: o pó precursor foi submetido à análise termogravimétrica (TGA50, Shimadzu) nas condições de temperatura entre 30 e 900 ºC na taxa de aquecimento 10 ºC/min sob atmosfera de nitrogênio.…”