Controlled aggregation of amphiphilic aggregation‐induced emission polycation and superparamagnetic iron oxide nanoparticles as fluorescence/magnetic resonance imaging probes

Fu, Shengxiang; Cai, Zhipeng; Liu, Li; Yang, Li; Jin, Rongrong; Lu, Zhiyun; Ai, Hua

doi:10.1002/app.48760

Cited by 6 publications

(6 citation statements)

References 55 publications

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“…The sensitivity of the polymer is comparable with previous reports; however, its detection range is higher than most of the reported ranges [ 37 , 41 , 42 ]. For example, Chen et al reported that the synthesis of polyphosphazene microspheres has selectivity for Fe 3+ aqueous solutions and a detection limit of 76 × 10 −9 M (0.076 μM) in a range from 0 to 10 μM [ 37 ].…”

Section: Resultssupporting

confidence: 87%

“…For example, Chen et al reported that the synthesis of polyphosphazene microspheres has selectivity for Fe 3+ aqueous solutions and a detection limit of 76 × 10 −9 M (0.076 μM) in a range from 0 to 10 μM [37]. Additionally, Yang et al reports sensitivity for Fe 3+ in N, N dimethylformamide The sensitivity of the polymer is comparable with previous reports; however, its detection range is higher than most of the reported ranges [37,41,42]. For example, Chen et al reported that the synthesis of polyphosphazene microspheres has selectivity for Fe 3+…”

Section: Photoluminescence Properties Of Poly(ani-amps)mentioning

confidence: 61%

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Role of the Anilinium Ion on the Selective Polymerization of Anilinium 2-Acrylamide-2-methyl-1-propanesulfonate

et al. 2021

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The development of anilinium 2-acrylamide-2-methyl-1-propanesulfonate (Ani-AMPS) monomer, confirmed by 1H NMR, 13C NMR, and FTIR, is systematically studied. Ani-AMPS contains two polymerizable functional groups, so it was submitted to selective polymerization either by free-radical or oxidative polymerization. Therefore, poly(anilinium 2-acrylamide-2-methyl-1-propanesulfonic) [Poly(Ani-AMPS)] and polyaniline doped with 2-acrylamide-2-methyl-1-propanesulfonic acid [PAni-AMPS] can be obtained. First, the acrylamide polymer, poly(Ani-AMPS), favored the π-stacking of the anilinium group produced by the inter- and intra-molecular interactions and was studied utilizing 1H NMR, 13C NMR, FTIR, and UV-Vis-NIR. Furthermore, poly(Ani-AMPS) fluorescence shows quenching in the presence of Fe2+ and Fe3+ in the emission spectrum at 347 nm. In contrast, the typical behavior of polyaniline is observed in the cyclic voltammetry analysis for PAni-AMPS. The optical properties also show a significant change at pH 4.4. The PAni-AMPS structure was corroborated through FTIR, while the thermal properties and morphology were analyzed utilizing TGA, DSC (except PAni-AMPS), and FESEM.

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Section: Resultssupporting

confidence: 87%

Section: Photoluminescence Properties Of Poly(ani-amps)mentioning

confidence: 61%

Role of the Anilinium Ion on the Selective Polymerization of Anilinium 2-Acrylamide-2-methyl-1-propanesulfonate

et al. 2021

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“…Water soluble MNP with pAA were synthesized by coprecipitation. [ 50 ] The size was 7.88 ± 2.49 nm according to TEM. Hydrophobic MNP decorated with oleic acid with a diameter of 5.03 ± 0.98 nm were obtained following a thermal decomposition procedure.…”

Section: Methodsmentioning

confidence: 99%

Patterning of Hydrophilic and Hydrophobic Gold and Magnetite Nanoparticles by Dip Pen Nanolithography

Schlichter

Bosse

Tyler

et al. 2023

Small

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by different methods such as electron beam lithography, [4] photolithography, [5] microcontact printing, [6] or microdroplet annealing. [7] Dip pen nanolithography (DPN) is another very powerful technique to pattern various materials on a range of substrates. [8] DPN is a mask-less and stamp-less method that can be performed at high resolution and under ambient conditions creating patterns of varying sizes and shapes on a single substrate. DPN can deliver small amounts of ink from an atomic force microscope (AFM) tip to a substrate. A meniscus is formed when the distance is small between the cantilever and substrate, transporting material from one side to the other (Figure 1). In the first example, Mirkin et al. deposited nanopatterns of n-octadecanethiol onto a gold surface with this approach. [9] Nowadays DPN is a very versatile method: The scope of inks ranges from small molecules, polymers, and proteins to colloids, metal ions, and sols. Two-dimensional assemblies of nanoparticles (NP) on surfaces provide many specific applications [10] ranging from plasmonics, electronics, and spintronics to sensing and biodiagnostics. [11][12][13] Molecular computing with NP holds potential for future technologies, [14,15] as there is a large research interest in patterned devices containing functional NP assemblies. [16] The term "evolution in materio" attracted much attention in recent years. [17,18] While creating large-area patterns is relatively slow with DPN, such small clusters of NP can be easily achieved. [19,20] Mirkin et al. created patterns of citrate-decorated gold nanoparticles (AuNP) and magnetite nanoparticles (MNP) ranging from 650 nm to 2250 nm. In their work, poly(ethylene glycol) was required as a matrix to transport the nanomaterials to different substrates. [21] Further, deposition of AuNP on thiol [19] or amine [22] functionalized surfaces was achieved, assuming that covalent interaction between substrate and NP limits the diffusion of the ink. As shown in later studies, this restriction is not required for successful lithography and thereby direct patterning of AuNP, but examples are still very rare in literature. [23] Interesting Au nanostructures such as stairs, flowers, and nanodiscs were fabricated by Zheng et al. who patterned polymer brushes as etch resist with DPN on a gold surface and conducted subsequent etching. [24,25] Next to etching-based techniques, also template-based DPN was investigated for Nanoparticles offer unique physical and chemical properties. Dip pen nanolithography of nanoparticles enables versatile patterning and nanofabrication with potential application in electronics and sensing, but is not well studied yet. Herein, the patterned deposition of various nanoparticles onto unmodified silicon substrates is presented. It is shown that aqueous solutions of hydrophilic citrate and cyclodextrin functionalized gold nanoparticles as well as poly(acrylic) acid decorated magnetite nanoparticles are feasible for writing nanostructures. Both smaller and larger nanoparticles can be pat...

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“…The resulting polymers were dialyzed for 3-6 days using dialysis tubes with a mass cut-off of 1000 g•mol -1 . MNP were obtained by following a coprecipitation method 28 and subsequent addition of pAA-AAP.…”

Section: Synthesismentioning

confidence: 99%

Synthesis of Photoresponsive Water-Dispersible Magnetite Nanoparticles using Arylazopyrazole Modified Polymers

Schlichter,

Jersch,

Demokritov

et al. 2024

Preprint

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In order to design new nanomaterials with improved functionalities, magnetite nanoparticles (MNP) modified with arylazopyrazole (AAP) molecular photoswitches are presented. Water-dispersibility is achieved by using poly(acrylic acid) (pAA) as a multidentate ligand, which is modified with AAP by amide coupling. The polymer ligand allows for the E-Z isomerization of the photoswitch, stabilizes the nanoparticles and provides pH responsiveness. Three different AAPs are synthesized and attached to pAA via amide coupling giving statistic co-polymers pAA-AAP. MNP are synthesized by co-precipitation and pAA-AAP is introduced as stabilizing agent in situ. Photoisomerization of pAA-AAP and pAA-AAP@MNP are investigated showing good photostationary states and cyclability. The nanoparticles can be assembled and dispersed reversibly in water by applying magnetic field and change in the pH value.

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Controlled aggregation of amphiphilic aggregation‐induced emission polycation and superparamagnetic iron oxide nanoparticles as fluorescence/magnetic resonance imaging probes

Cited by 6 publications

References 55 publications

Role of the Anilinium Ion on the Selective Polymerization of Anilinium 2-Acrylamide-2-methyl-1-propanesulfonate

Role of the Anilinium Ion on the Selective Polymerization of Anilinium 2-Acrylamide-2-methyl-1-propanesulfonate

Patterning of Hydrophilic and Hydrophobic Gold and Magnetite Nanoparticles by Dip Pen Nanolithography

Synthesis of Photoresponsive Water-Dispersible Magnetite Nanoparticles using Arylazopyrazole Modified Polymers

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