Polymers designed to control nucleation and growth of inorganic crystals from aqueous media

Wegner, Gerhard; Baum, Pia; Müller, Maren; Norwig, Jochen; Landfester, Katharina

doi:10.1002/1521-3900(200110)175:1<349::aid-masy349>3.0.co;2-9

Cited by 86 publications

(98 citation statements)

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“…DBCPs). 25 To our knowledge, this is the first study providing unambiguous and direct quantitative experimental evidence, by the use of ALD-grown single orientation ZnO films, for the (selective and non-selective) adsorption-driven ZnO morphology modification by biomolecules and specifically a ZnO-BP identified from phage display libraries.…”

Section: Methodsmentioning

confidence: 86%

“…The most commonly used approach is that involving SDAs ranging from simple molecules, such as amines [13][14][15][16] and anionic species, [17][18][19][20][21] to polymers (DBCP, [22][23][24][25][26][27][28][29] PVP, [30][31][32][33][34][35][36][37][38][39][40][41][42] PAM, 29 and PAH 43 ) and biomolecules. [44][45][46][47][48][49][50][51][52] The SDAs have been shown to affect the morphology of ZnO by imposition of effects on nucleation and/or growth of the crystals.…”

Section: Introductionmentioning

confidence: 99%

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Direct evidence of ZnO morphology modification via the selective adsorption of ZnO-binding peptides

et al. 2011

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Biomolecule-mediated ZnO synthesis has great potential for the tailoring of ZnO morphology for specific application in biosensors, window materials for display and solar cells, dye-sensitized solar cells (DSSCs), biomedical materials, and photocatalysts due to its specificity and multi-functionality. In this contribution, the effect of a ZnO-binding peptide (ZnO-BP, G-12: GLHVMHKVAPPR) and its GGGC-tagged derivative (GT-16: GLHVMHKVAPPRGGGC) on the growth of ZnO crystals expressing morphologies dependent on the relative growth rates of (0001) and (10 10) planes of ZnO have been studied. The amount of peptide adsorbed was determined by a depletion method using oriented ZnO films grown by Atomic Layer Deposition (ALD), while the adsorption behavior of G-12 and GT-16 was investigated using XPS and a computational approach. Direct evidence was obtained to show that (i) both the ZnO-BP identified by phage display and its GGGC derivative (GT-16) are able to bind to ZnO and modify crystal growth in a molecule and concentration dependent fashion, (ii) plane selectivity for interaction with the (0001) versus the (10 10) crystal planes is greater for GT-16 than G-12; and (iii) specific peptide residues interact with the crystal surface albeit in the presence of charge compensating anions. To our knowledge, this is the first study to provide unambiguous and direct quantitative experimental evidence of the modification of ZnO morphology via (selective and nonselective) adsorption-growth inhibition mechanisms mediated by a ZnO-BP identified from phage display libraries.

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Section: Methodsmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Direct evidence of ZnO morphology modification via the selective adsorption of ZnO-binding peptides

et al. 2011

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“…[34] It is also well documented that ZnO and carboxylic acid interact very strongly www.afm-journal.de forming ionic bonding due to the electrostatic forces between Zn 2þ and the polar acid. [35][36][37] The strong bonding between ZnO and carboxylic acid has also been demonstrated on carbon nanotubes (CNTs) where the high level of control over lattice defects has allowed investigations into the affinity of ZnO for certain functional groups, with the results showing the greatest affinity for carboxylic acid. [38,39] It is believed during the seeding process the ZnO nanoparticles self-assembly on the functional site of the carbon fiber leading to ionic bonding across the interface and greater adhesion than epoxy.…”

Section: V-notch Shear Testingmentioning

confidence: 99%

Increased Interface Strength in Carbon Fiber Composites through a ZnO Nanowire Interphase

Lin

Ehlert

Sodano

2009

Adv Funct Materials

224

178

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One of the most important factors in the design of a fiber reinforced composite is the quality of the fiber/matrix interface. Recently carbon nanotubes and silicon carbide whiskers have been used to enhance the interfacial properties of composites; however, the high growth temperature degrade the fiber strength and significantly reduce the composite's in‐plane properties. Here, a novel method for enhancing the fiber/matrix interfacial strength that does not degrade the mechanical properties of the fiber is demonstrated. The composite is fabricated using low‐temperature solution‐based growth of ZnO nanowires on the surface of the reinforcing fiber. Experimental testing shows the growth does not adversely affect fiber strength, interfacial shear strength can be significantly increased by 113%, and the lamina shear strength and modulus can be increased by 37.8% and 38.8%, respectively. This novel interface could also provide embedded functionality through the piezoelectric and semiconductive properties of ZnO.

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“…This is in contrast to for example ZnO where both synthetic polymers and short peptides lead to well-defined particles with a narrow size distribution. [30][31][32][33]38,39 TEM therefore shows that the amino acids used as growth modifiers are inefficient in the sense that no uniform particle morphology and particle size is obtained. a The control sample is composed of 94% magnetite and 6% goethite.…”

Section: Resultsmentioning

confidence: 99%

Amino Acids in Iron Oxide Mineralization: (Incomplete) Crystal Phase Selection Is Achieved Even with Single Amino Acids

et al. 2008

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Iron oxides are important minerals in biology and materials science. Using biomimetic synthesis, a variety of iron oxides have been fabricated. However, it is still not clear how growth modifiers like amino acids and peptides select different crystal phases of a complex material like iron oxide. The current paper shows that already with single amino acids, (incomplete) crystal phase selection is achieved in vitro. In particular, L-histidine, L-threonine, and L-cysteine favor the formation of unstable crystal phases like ferrihydrite or lepidocrocite, although sometimes only at high amino acid concentrations. Other amino acids like L-valine have only minor effects when compared to control samples grown in the absence of amino acids. The effects of the amino acids can be rationalized via kinetic trapping and different interaction strengths of the amino acids with the growing iron oxide particles. The effects of the amino acids on the particle morphologies are less significant. The paper therefore shows that single amino acids can be a valuable tool for the materials chemist to fabricate and stabilize even unstable iron oxide crystal phases.

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Polymers designed to control nucleation and growth of inorganic crystals from aqueous media

Cited by 86 publications

References 0 publications

Direct evidence of ZnO morphology modification via the selective adsorption of ZnO-binding peptides

Direct evidence of ZnO morphology modification via the selective adsorption of ZnO-binding peptides

Increased Interface Strength in Carbon Fiber Composites through a ZnO Nanowire Interphase

Amino Acids in Iron Oxide Mineralization: (Incomplete) Crystal Phase Selection Is Achieved Even with Single Amino Acids

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