Nanoscale manipulation of CdSe quantum dots in layer-by-layer films: influence of the host polyelectrolyte on the luminescent properties

Zucolotto, Valtencir; Gattás‐Asfura, Kerim M.; Tumolo, Tathyana; Perinotto, Ângelo C.; Antunes, Pedro; Constantino, Carlos J. L.; Baptista, Maurı́cio S.; Leblanc, Roger M.; Oliveira, Osvaldo N.

doi:10.1016/j.apsusc.2004.11.044

Cited by 42 publications

(31 citation statements)

References 25 publications

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“…The linear increment of the absorbance as a function of number of bi/tetralayers shown in Fig. 2 suggests that a similar amount of material is adsorbed after each deposition step, characteristic of self-regulated systems, in agreement with previously reported papers [6,12,16]. A slight increase in the deposition efficiency may be observed for the system containing the chicha gum.…”

Section: Growth Of the Lbl Filmssupporting

confidence: 78%

“…Examples include the tetrasulfonate phthalocyanines which are water-soluble due to the presence of four SO 3 − groups [7][8][9]11]. In a previous publication [6] it was shown for the first time that metallic PCs may be assembled in conjunction with chicha gums to form stable, electroactive thin films, in which the nanoscale-sized layers could be easily formed upon adsorption from water solution using the layer-by-layer (LbL) technique [11][12][13][14]. Briefly, the LbL technique is based on the alternate adsorption of layers of materials bearing opposite charges, leading to the formation of three-dimensional networks [12,14].…”

Section: Introductionmentioning

confidence: 99%

“…In a previous publication [6] it was shown for the first time that metallic PCs may be assembled in conjunction with chicha gums to form stable, electroactive thin films, in which the nanoscale-sized layers could be easily formed upon adsorption from water solution using the layer-by-layer (LbL) technique [11][12][13][14]. Briefly, the LbL technique is based on the alternate adsorption of layers of materials bearing opposite charges, leading to the formation of three-dimensional networks [12,14]. In addition to the experimental simplicity, the LbL technique is characterized by the self-assembly regulation in which the system adopts the adequate configuration as a function of parameters such as pH and ionic strength [14].…”

Section: Introductionmentioning

confidence: 99%

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Natural Polysaccharides as Active Biomaterials in Nanostructured Films for Sensing

Eiras

Santos

Zampa

et al. 2010

Journal of Biomaterials Science, Polymer Edition

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The search for natural, biocompatible and degradable materials amenable to be used in biomedical/analytical applications has attracted attention, either from the environmental or medical point of view. Examples are the polysaccharides extracted from natural gums, which have found applications in the food and pharmaceutical industries as stabilizers or thickening agent. In a previous paper, however, it was shown that a Brazilian natural gum, chicha (Sterculia striata), is suitable for application as building block for nanostructured film fabrication in conjunction with phthalocyanines. The films displayed electroactivity and could be used in sensing. In the present paper, we introduce the use of two different natural gums, viz., angico (Anadenanthera colubrina) and caraia (Sterculia urens), as active biomaterials to be used to modification layers, in the form of nanostructured thin films, including the study of dopamine detection. The multilayer films were assembled in conjunction with nickel tetrasulfonated phthalocyanines (NiTsPC) and displayed good chemical and electrochemical stability, allowing their use as transducer elements in sensors for detection of specific neurotransmitters. It is suggested here that nanoscale manipulation of new biodegradable natural polymers opens up a variety of new opportunities for the use of these materials in advanced biomedical and analytical devices.

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Section: Growth Of the Lbl Filmssupporting

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Natural Polysaccharides as Active Biomaterials in Nanostructured Films for Sensing

Eiras

Santos

Zampa

et al. 2010

Journal of Biomaterials Science, Polymer Edition

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“…The QDs used in this study ar capped with thioglycolic acid (TGA negative charge [12]. The QDs w previously published procedures a NaOH [12]. The optical properties o QDs are shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

“…For the suspended in Milli-Q distilled and d 9.4 to facilitate a strong negative [11]. The QDs used in this study ar capped with thioglycolic acid (TGA negative charge [12]. The QDs w previously published procedures a NaOH [12].…”

Section: Introductionmentioning

confidence: 99%

Integration of Optical Protein and Quantum Dot Films for Biosensing

Griep

Mallick²,

Lueking

et al. 2008

2008 8th IEEE Conference on Nanotechnology

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Public reporting burden for the collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to a penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number.

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Self‐Assembling Nanoparticles at Surfaces and Interfaces

2008

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Nanoparticles are the focus of much attention due to their astonishing properties and numerous possibilities for applications in nanotechnology. For realising versatile functions, assembly of nanoparticles in regular patterns on surfaces and at interfaces is required. Assembling nanoparticles generates new nanostructures, which have unforeseen collective, intrinsic physical properties. These properties can be exploited for multipurpose applications in nanoelectronics, spintronics, sensors, etc. This review surveys different techniques, currently employed and being developed, for assembling nanoparticles in to ordered nanostructures. In this endeavour, the principles and methods involved in the development of assemblies are discussed. Subsequently, different possibilities of nanoparticle-based nanostructures, obtained in multi-dimensions, are presented.

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Nanoscale manipulation of CdSe quantum dots in layer-by-layer films: influence of the host polyelectrolyte on the luminescent properties

Cited by 42 publications

References 25 publications

Natural Polysaccharides as Active Biomaterials in Nanostructured Films for Sensing

Natural Polysaccharides as Active Biomaterials in Nanostructured Films for Sensing

Integration of Optical Protein and Quantum Dot Films for Biosensing

Self‐Assembling Nanoparticles at Surfaces and Interfaces

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