Study of colloidal particle Brownian aggregation by low-coherence fiber optic dynamic light scattering

Xia, Hui; Pang, Ru Yi; Zhang, Rui; Miao, Cai Xia; Wu, Xiao Yun; Hou, Xue Shun; Zhong, Cheng

doi:10.1016/j.jcis.2012.02.061

Cited by 7 publications

(4 citation statements)

References 32 publications

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“…Analysis of hydrodynamic size was performed using the CONTIN algorithm. 25 In vitro evaluation of labeled Uc-Msc UC-MSC labeling was carried out in three phases. First, we standardized the best MION-Rh concentration for labeling UC-MSC; second, we proceeded to the UC-MSC titration; and third, we evaluated the labeling intensity over time.…”

mentioning

confidence: 99%

“…39 Here we evaluated the colloidal stability of MION-Rh in both DMEM-LG and RPMI 1640 because these particles remain stable in both types of medium; however, DMEM-LG is the most often cited in the literature, so we chose to continue the experiments using DMEM-LG. [23][24][25] The labeling efficacy or "MION-Rh wrapping" by UC-MSC is highly dependent on interactions between SPION and cell membranes. 40 These interactions can be influenced by targeting agents (eg, antibodies), cell receptors, coating properties (eg, charge and hydrophobicity/hydrophilicity), and a negative charge on the cell membrane.…”

mentioning

confidence: 99%

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Umbilical cord mesenchymal stem cells labeled with multimodal iron oxide nanoparticles with fluorescent and magnetic properties: application for in vivo cell tracking

Sibov¹,

Pavon²,

Miyaki³

et al. 2014

IJN

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Here we describe multimodal iron oxide nanoparticles conjugated to Rhodamine-B (MION-Rh), their stability in culture medium, and subsequent validation of an in vitro protocol to label mesenchymal stem cells from umbilical cord blood (UC-MSC) with MION-Rh. These cells showed robust labeling in vitro without impairment of their functional properties, the viability of which were evaluated by proliferation kinetic and ultrastructural analyzes. Thus, labeled cells were infused into striatum of adult male rats of animal model that mimic late onset of Parkinson’s disease and, after 15 days, it was observed that cells migrated along the medial forebrain bundle to the substantia nigra as hypointense spots in T2 magnetic resonance imaging. These data were supported by short-term magnetic resonance imaging. Studies were performed in vivo, which showed that about 5 × 10 5 cells could be efficiently detected in the short term following infusion. Our results indicate that these labeled cells can be efficiently tracked in a neurodegenerative disease model.

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mentioning

confidence: 99%

mentioning

confidence: 99%

Umbilical cord mesenchymal stem cells labeled with multimodal iron oxide nanoparticles with fluorescent and magnetic properties: application for in vivo cell tracking

Sibov¹,

Pavon²,

Miyaki³

et al. 2014

IJN

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“…The droplet moves once deposited on the LM. Similar to the Brownian particles, − the droplet shows random moving behavior. The trajectory of the droplet within 2 s is shown in Figure d.…”

Section: Resultsmentioning

confidence: 94%

Spontaneous Motion and Rotation of Acid Droplets on the Surface of a Liquid Metal

Wang

Miao

et al. 2021

Langmuir

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Self-propulsion of droplets is of great significance in many fields. The spontaneous horizontal motion and self-jumping of droplets have been well realized in various ways. However, there is still a lack of an effective method to enable a droplet to rotate spontaneously and steadily. In this paper, by employing an acid droplet and a liquid metal, the spontaneous and steady rotation of droplets is achieved. For an acid droplet, it may spontaneously move when it is deposited on the surface of the liquid metal. By adjusting experimental parameters to the proper range, the self-rotation of droplet happens. This phenomenon originates from the fluctuation of the droplet boundary and the collective movement of bubbles that are generated by the chemical reactions between the acid droplet and liquid metal. This rotation has a simpler implementation method and more steady rotation state. Its angular velocity is much higher than that driven by other mechanisms. Moreover, the movements of acid droplets on the liquid metal are classified according to experimental conditions. The internal flow fields, the movements and distribution of bubbles, and the fluctuation of the droplet boundary are also explored and discussed. The theoretical model describing the rotational droplet is given. Our work may deepen the understanding of the physical system transition affected by chemical reactions and provide a new way for the design of potential applications, e.g., micro- and nanodevices.

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“…The colloidal particle size was found to monotonically increase from an average of 538.1 nm to 1266 nm as the precursor storage time increases from the 0 d to 8th day samples. The size enlarging is ascribed to the spontaneous agglomeration of colloidal particles [49]. At first, there are many small sol-gel particles in the precursor.…”

Section: Resultsmentioning

confidence: 99%

Aged sol-gel solution-processed texture tin oxide for high-efficient perovskite solar cells

Hu²,

Wang³

et al. 2020

Nanotechnology

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Mesoporous n–i–p perovskite solar cells (PeSCs) demonstrate attractive potential for obtaining high power conversion efficiencies (PCEs), by employing inorganic electron transport layers (ETLs). However, these ETLs composed of dual layers (a condense layer and a mesoporous layer) suffer the composite process and high sintering temperature. Here, we demonstrate a simple and efficient process to improve the device performance of PeSCs by using a textured SnO2 film. Self-aged sol-gel SnO2 solution after spin coating results in a textured structure without sacrificing the surface coverage. Excellent light trapping ability is achieved by optimizing the aged time of sol-gel SnO2 solution, which mimics the evolution of the conventional mesoporous layer. Such a SnO2 textured structure provides a large contact area for rapid charge extraction, and alleviates interfacial recombination loss. Therefore, this PeSC yields an optimal PCE of 19%, which is prominent in state-of-the-art SnO2-based devices. These results indicate that one-step solution processed SnO2 with a textured structure offers a simple and efficient way to improve the device performance of PeSCs without a complex process.

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Study of colloidal particle Brownian aggregation by low-coherence fiber optic dynamic light scattering

Cited by 7 publications

References 32 publications

Umbilical cord mesenchymal stem cells labeled with multimodal iron oxide nanoparticles with fluorescent and magnetic properties: application for in vivo cell tracking

Umbilical cord mesenchymal stem cells labeled with multimodal iron oxide nanoparticles with fluorescent and magnetic properties: application for in vivo cell tracking

Spontaneous Motion and Rotation of Acid Droplets on the Surface of a Liquid Metal

Aged sol-gel solution-processed texture tin oxide for high-efficient perovskite solar cells

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