Bioinspired 1D Superparamagnetic Magnetite Arrays with Magnetic Field Perception

Jiang, Xiangyu; Feng, Jiangang; Huang, Lei; Wu, Yuchen; Su, Bin; Yang, Wensheng; Mai, Liqiang; Jiang, Lei

doi:10.1002/adma.201601609

Cited by 47 publications

(53 citation statements)

References 31 publications

(29 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Innovations regarding the superwettability-based interfacial chemistry involved in chemical reaction and nanofabrication have attracted significant attention in energy, environment, and health areas 23 – 25 . Controllable dewetting process has become an effective strategy to manipulate 1D array formation 26 – 29 . Aggregation-induced emission (AIE) molecules are nonemissive or provide weak fluorescence in dispersed state, but they become highly fluorescent in aggregated state, which are unique comparing to traditional solvatochromic dyes 30 – 34 .…”

Section: Introductionmentioning

confidence: 99%

Highly-sensitive optical organic vapor sensor through polymeric swelling induced variation of fluorescent intensity

et al. 2018

Self Cite

View full text Add to dashboard Cite

Traditional optical organic vapor sensors with solvatochromic shift mechanisms have lower sensitivity due to weak intermolecular interactions. Here, we report a general strategy to prepare a higher sensitivity optical organic vapor sensor through polymeric swelling-induced variation of fluorescent intensity. We combine one-dimensional polymeric structures and aggregation-induced emission (AIE) molecules together to form a polymer/AIE microwires array as a sensor. The prepared sensors based on different commercial polymers can successfully classify and identify various organic vapors. Among them, the poly(vinyl butyral)/AIE microwires array can detect methanol vapor as low as 0.05% of its saturation vapor pressure. According to the theory of like dissolves like, we further fabricate a polymer/AIE microwires array derived from designable polyethersulfones, through regulating their side chains, to distinguish similar organic vapors of benzene and toluene. Both experimental and theoretical simulation results reveal that specific molecular interactions between the polyethersulfones and organic vapors can improve the specific recognition performance of the sensors.

show abstract

Section: Introductionmentioning

confidence: 99%

Highly-sensitive optical organic vapor sensor through polymeric swelling induced variation of fluorescent intensity

et al. 2018

Self Cite

View full text Add to dashboard Cite

show abstract

“…The chaining, or the formation of the so-called magnetosomes, is a result of intrinsic magnetic anisotropy, where magnetic particles orient and assemble with their easy magnetization axes (magnetization vectors) parallel to the magnetic field vector to minimize the magnetostatic energy of individual nanoparticles 6,7 . This phenomenon combines the magnetic moments present in every magnetic particle in a particular direction, which is considered a promising venue for fabricating functional devices 8,9 .…”

Section: Introductionmentioning

confidence: 99%

Inkjet Printing of Magnetic Particles Toward Anisotropic Magnetic Properties

Al‐Milaji

Hadimani

Gupta

et al. 2019

Sci Rep

View full text Add to dashboard Cite

Unique properties of one-dimensional assemblies of particles have attracted great attention during the past decades, particularly with respect to the potential for anisotropic magnetism. Patterned films can be created using inkjet printing; however, drying of particle-laden colloidal droplets on solid surfaces is usually accompanied by the well-known coffee-ring effect, deteriorating both the uniformity and resolution of the printed configurations. This study examines the effect of externally applied magnetic field on particle deposition patterns. Ferromagnetic Gd5Si4 particles were formulated in terpineol oil and directly deposited via magnetic field-assisted inkjet printing on a photopaper to generate patterned films with suppressed coffee-ring effect. The particle deposition morphology is determined by both solvent imbibition and particle-magnetic field interactions. Three characteristic times are considered, namely, the critical time for solvent imbibition into the substrate (tim), the time it takes for particles to form chains in the presence of the magnetic field (tch), and the time in which the particles reach the substrate in the direction normal to the substrate (tpz). The characteristic time ratios (tpz/tim) and (tpz/tch) determine the final deposition morphology in the presence of magnetic field. The ability to control particle deposition and assembly, thus tuning the magnetic anisotropic properties of nanostructured materials is a promising approach for many engineering applications.

show abstract

“…Since magnetosomes are single magnetic domains, the chain behaves as a large single permanent dipole magnet which is able to passively reorient the whole bacteria along external magnetic field lines, even at fields as small as those existing near the Earth's surface (≈20-60 μT). [3][4][5] On top of the fundamental scientific interest of these fascinating microorganisms, magnetosome chains constitute a natural paradigm of highly anisotropic magnetic nanostructures, which show high potentiality in biomedical applications, [6][7][8][9] in actuation devices as nanorobots, 10 in nanosensor devices, 11 and in magnetic memory devices. 12 Among all the MTB species, Magnetospirillum gryphiswaldense strain MSR-1 is frequently used as a model strain of MTB due to its ease of cultivation in the laboratory.…”

mentioning

confidence: 99%

Configuration of the magnetosome chain: a natural magnetic nanoarchitecture

et al. 2018

View full text Add to dashboard Cite

Magnetospirillum gryphiswaldense is a microorganism with the ability to biomineralize magnetite nanoparticles, called magnetosomes, and arrange them into a chain that behaves like a magnetic compass. Rather than straight lines, magnetosome chains are slightly bent, as evidenced by electron cryotomography. Our experimental and theoretical results suggest that due to the competition between the magnetocrystalline and shape anisotropies, the effective magnetic moment of individual magnetosomes is tilted out of the [111] crystallographic easy axis of magnetite. This tilt does not affect the direction of the chain net magnetic moment, which remains along the [111] axis, but explains the arrangement of magnetosomes in helical-like shaped chains. Indeed, we demonstrate that the chain shape can be reproduced by considering an interplay between the magnetic dipolar interactions between magnetosomes, ruled by the orientation of the magnetosome magnetic moment, and a lipid/protein-based mechanism, modeled as an elastic recovery force exerted on the magnetosomes.

show abstract

Bioinspired 1D Superparamagnetic Magnetite Arrays with Magnetic Field Perception

Cited by 47 publications

References 31 publications

Highly-sensitive optical organic vapor sensor through polymeric swelling induced variation of fluorescent intensity

Highly-sensitive optical organic vapor sensor through polymeric swelling induced variation of fluorescent intensity

Inkjet Printing of Magnetic Particles Toward Anisotropic Magnetic Properties

Configuration of the magnetosome chain: a natural magnetic nanoarchitecture

Contact Info

Product

Resources

About