Development of a Colloidal Lithography Method for Patterning Nonplanar Surfaces

Bhawalkar, Sarang P.; Qian, Jun; Heiber, Michael C.; Li, Jia

doi:10.1021/la1035147

Cited by 43 publications

(39 citation statements)

References 33 publications

(45 reference statements)

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“…In addition, colloid lithography has been applied to generate nanoscale topographical features on curvilinear surfaces of microscale particles and scaffolds to create hierarchical topographical biomaterials that are difficult to obtain using conventional methods [39–41, 56]. Combining nanoscale patterned surfaces generated by photolithography and EBL with colloid self-assembly, it is also possible to achieve regular patterns of nanotopography with curvilinear local geometries [59].…”

Section: Fabrication Of Nanotopographical Surfacesmentioning

confidence: 99%

Nanotopographical surfaces for stem cell fate control: Engineering mechanobiology from the bottom

et al. 2014

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Summary During embryogenesis and tissue maintenance and repair in an adult organism, a myriad of stem cells are regulated by their surrounding extracellular matrix (ECM) enriched with tissue/organ-specific nanoscale topographical cues to adopt different fates and functions. Attributed to their capability of self-renewal and differentiation into most types of somatic cells, stem cells also hold tremendous promise for regenerative medicine and drug screening. However, a major challenge remains as to achieve fate control of stem cells in vitro with high specificity and yield. Recent exciting advances in nanotechnology and materials science have enabled versatile, robust, and large-scale stem cell engineering in vitro through developments of synthetic nanotopographical surfaces mimicking topological features of stem cell niches. In addition to generating new insights for stem cell biology and embryonic development, this effort opens up unlimited opportunities for innovations in stem cell-based applications. This review is therefore to provide a summary of recent progress along this research direction, with perspectives focusing on emerging methods for generating nanotopographical surfaces and their applications in stem cell research. Furthermore, we provide a review of classical as well as emerging cellular mechano-sensing and -transduction mechanisms underlying stem cell nanotopography sensitivity and also give some hypotheses in regard to how a multitude of signaling events in cellular mechanotransduction may converge and be integrated into core pathways controlling stem cell fate in response to extracellular nanotopography.

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Section: Fabrication Of Nanotopographical Surfacesmentioning

confidence: 99%

Nanotopographical surfaces for stem cell fate control: Engineering mechanobiology from the bottom

et al. 2014

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“…[74] Similarly, assembly at the air/water interface has been exploited for the preparation of non-close-packed monolayers. [203][204] An alternative approach consists of the preparation of close-packed monolayers that are exposed to plasma in order to yield non-close-packed arrangements. [95,136,205] Several researchers have applied this process.…”

Section: Introductionmentioning

confidence: 99%

Surface Patterning with Colloidal Monolayers

Vogel

2012

Springer Theses

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This thesis focuses on the controlled assembly of monodisperse polymer colloids into ordered two-dimensional arrangements. These assemblies, commonly referred to as colloidal monolayers, are subsequently used as masks for the generation of arrays of complex metal nanostructures on solid substrates.The motivation of the research presented here is twofold. First, monolayer crystallization methods were developed to simplify the assembly of colloids and to produce more complex arrangements of colloids in a precise way. Second, various approaches to colloidal lithography are designed with the aim to include novel features or functions to arrays of metal nanostructures.The air/water interface was exploited for the crystallization of colloidal monolayer architectures as it combines a two-dimensional confinement with a high lateral mobility of the colloids that is beneficial for the creation of high long range order. A direct assembly of colloids is presented that provides a cheap, fast and conceptually simple methodology for the preparation of ordered colloidal monolayers. The produced two-dimensional crystals can be transformed into nonclose-packed architectures by a plasma-induced size reduction step, thus providing valuable masks for more sophisticated lithographic processes. Finally, the controlled co-assembly of binary colloidal crystals with defined stoichiometries on a Langmuir trough is introduced and characterized with respect to accessible configurations and size ratios.Several approaches to lithography are presented that aim at introducing different features to colloidal lithography. First, using metal-complex containing latex particles, the synthesis of which is described as well, symmetric arrays of metal nanoparticles can be created by controlled combustion of the organic material of the colloids. The process does not feature an inherent limit in nanoparticle size and is able to produce complex materials as will be demonstrated for FePt alloy particles. Precise control over both size and spacing of the particle array is presented.Second, two lithographic processes are introduced to create sophisticated nanoparticle dimer units consisting of two crescent shaped nanostructures in close proximity; essentially by using a single colloid as mask to generate two structures simultaneously. Strong coupling processes of the parental plasmon resonances of the two objects are observed that are accompanied by high near-field enhancements. A plasmon hybridization model is elaborated to explain all polarization dependent shifts of the resonance positions. Last, a technique to produce laterally patterned, ultra-flat substrates without surface topographies by embedding gold nanoparticles in a silicon dioxide matrix is applied to construct robust and re-usable sensing architectures and to introduce an approach for the nanoscale patterning of solid supported lipid bilayer membranes.

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“…[ 15 ] Colloidal lithography has also been used to pattern diverse substrates with particles as small as ≈ 100 nm. [ 16 ] Here, we present an alternative patterning technique based on initiated chemical vapor deposition (iCVD). Our method is unique in that it yields high-resolution polymeric features on planar and curved substrates, enables fabrication of metal features via pattern transfer, and facilitates synthesis of bifunctional organic surfaces.…”

Section: Doi: 101002/adma201201975mentioning

confidence: 99%

Initiated Chemical Vapor Deposition‐Based Method for Patterning Polymer and Metal Microstructures on Curved Substrates

Petruczok

Gleason

2012

Advanced Materials

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A simple, efficient, and scalable method for patterning microstructures on curved substrates is demonstrated. Initiated chemical vapor deposition is used to synthesize a thin film that crosslinks upon UV exposure. Polymeric features are defined on glass rods with high curvature and used as masks for metal patterning. Additionally, vapor-deposited polymer layers are selectively patterned to produce bifunctional surfaces.

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Development of a Colloidal Lithography Method for Patterning Nonplanar Surfaces

Cited by 43 publications

References 33 publications

Nanotopographical surfaces for stem cell fate control: Engineering mechanobiology from the bottom

Nanotopographical surfaces for stem cell fate control: Engineering mechanobiology from the bottom

Surface Patterning with Colloidal Monolayers

Initiated Chemical Vapor Deposition‐Based Method for Patterning Polymer and Metal Microstructures on Curved Substrates

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