Track topics on Twitter Track topics that are important to you
When a colloidal suspension droplet evaporates from a solid surface, it leaves a characteristic deposit in the contact region. These deposits are common and important for many applications in printing, coating, or washing. By using superamphiphobic surfaces as a substrate, the contact area can be reduced so that evaporation is almost radially symmetric. While drying, the droplets maintain a nearly perfect spherical shape. Here, we exploit this phenomenon to fabricate supraparticles from bidisperse colloidal aqueous suspensions. The supraparticles have a core-shell morphology. The outer region is predominantly occupied by small colloids forming a close-packed, crystalline structure. Towards the center, the number of large colloids increases and they are packed amorphously. The extent of this stratification decreases with decreasing the evaporation rate. Complementary simulations indicate that evaporation leads to a local increase in density, which in turn exerts stronger inward forces on the larger colloids. Comparison between experiments and simulations suggest that hydrodynamic interactions between the suspended colloids reduce the extent of stratification. Our findings are relevant for the fabrication of supraparticles for applications in the fields of chromatography, catalysis, drug delivery, photonics, and a better understanding of spray drying.
This article was published in the following journal.
Name: ACS nano
The evaporation of colloidal drop on a substrate with a pinned contact line usually results in a ring stain (the so-called coffee-ring effect). In this paper, we present an investigation of the evapor...
Self-assembly of two types of particles into the binary colloidal crystals (BCCs) leads to the peculiar features which the monocomponent colloidal crystals do not possess. However, the self-assembly m...
The drying and crystallisation of solution droplets is a problem of broad relevance, determining the micro-structures of particles formed in spray drying, the phase of particles delivered by, for exam...
Capillary interactions play an important role in directing colloidal assembly on fluid interfaces. Interface curvature is expected to influence not only individual particle migration on interfaces but...
The evaporation of droplets of colloidal suspensions onto a surface is a common tool to achieve surface coatings and self-assembly. Yet, because of the spontaneous flow developing within an evaporatin...
The purpose of this study is to compare the changes in blood lipids and feelings of satiety after consumption of oil-in-water emulsions in which the droplets are in either the liquid or so...
To determine the genetic components of hypertension using a series of simulation experiments designed to determine the power and validity of the then recently developed methods of segregat...
Subjective and objective evaluation of the efficacy and tolerability of preservative-free "Ectoin® Eye Spray - Colloidal" and comparison of the efficacy and tolerability between "Ectoin®...
Chronic rhinosinusitis is a highly prevalent disease resulting in high economic burden. Effective therapeutic options are needed. Rhinosinusitis-related biofilms are a likely contributor t...
The purpose of this trial is to evaluate the pharmacokinetics of single intravenous of Amphotericin B Colloidal Dispersion(ABCD)in Chinese healthy subjects.
The orderly segregation of CHROMOSOMES during MEIOSIS or MITOSIS.
A mass spectrometry technique used for analysis of nonvolatile compounds such as proteins and macromolecules. The technique involves preparing electrically charged droplets from analyte molecules dissolved in solvent. The electrically charged droplets enter a vacuum chamber where the solvent is evaporated. Evaporation of solvent reduces the droplet size, thereby increasing the coulombic repulsion within the droplet. As the charged droplets get smaller, the excess charge within them causes them to disintegrate and release analyte molecules. The volatilized analyte molecules are then analyzed by mass spectrometry.
A perilipin that localizes to LIPID DROPLETS; CYTOPLASM; ENDOSOMES; and PLASMA MEMBRANE, especially in MACROPHAGES. It functions as a transporter of free fatty acids to lipid droplets to promote their biogenesis and growth. It is also required for the transport of the MANNOSE-6-PHOSPHATE RECEPTOR from endosomes to the TRANS-GOLGI NETWORK. Its structure consists of four helix bundles that interact with the hydrophobic lipid droplet surface.
A perilipin that is expressed by many different cell types. It binds FATTY ACIDS and CHOLESTEROL, stabilizes TRIGLYCERIDES, and localizes to both the surface and hydrophobic core of LIPID DROPLETS, as well as the ENDOPLASMIC RECTICULUM and PLASMA MEMBRANE in MACROPHAGES. It also plays a central role in the biogenesis of lipid droplets and FOAM CELLS and is highly expressed by macrophages at atherosclerotic lesions in human arteries along with the INFLAMMATION markers TNF-ALPHA; MCP-1 RECEPTOR; and IL-6.
Inorganic binary compounds of iodine or the I- ion.
Complementary and Alternative Medicine
Alternative medicine are whole medical systems that did not fit with conventional medicine as they have completely different philosophies and ideas on the causes of disease, methods of diagnosis and approaches to treatment. Although often overlapping, co...
<!--LGfEGNT2Lhm-->Drug delivery is the method or process of administering a pharmaceutical compound to achieve a therapeutic effect in humans or animals. <!--LGfEGNT2Lhm-->Drug delivery technologies are <!--LGfEGNT2Lhm-->patent pr...