Dynamically switchable biointerfaces

Sun, Aimin; Lahann, Joerg

doi:10.1039/b816302b

Cited by 37 publications

(31 citation statements)

References 86 publications

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“…With breakthroughs in the synthesis of faceted nanoparticles that has spurred interest in studying packings for continuously transforming building blocks [36,64], it is likely that more second-and higher order transformations will be discovered for other families of continuously transforming particle shapes. It is noteworthy that these transformations-whether they are first-order or second-order-can be experimentally realized in systems of reconfigurable particles that change geometry as a result of external stimuli such as change in ionic strength, pH, temperature, or pressure [65][66][67][68].…”

Section: Discussionmentioning

confidence: 99%

Packing and self-assembly of truncated triangular bipyramids

et al. 2013

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Motivated by breakthroughs in the synthesis of faceted nano-and colloidal particles, as well as theoretical and computational studies of their packings, we investigate a family of truncated triangular bipyramids. We report dense periodic packings with small unit cells that were obtained via numerical and analytical optimization. The maximal packing fraction φmax changes continuously with the truncation parameter t. Eight distinct packings are identified based on discontinuities in the first and second derivatives of φmax(t). These packings differ in the number of particles in the fundamental domain (unit cell) and the type of contacts between the particles. In particular, we report two packings with four particles in the unit cell for which both φmax(t) and φ max (t) are continuous and the discontinuity occurs in the second derivative only. In the self-assembly simulations that we perform for larger boxes with 2048 particles, only one out of eight packings is found to assemble. In addition, the degenerate quasicrystal reported previously for triangular bipyramids without truncation [Haji-Akbari et al., Phys. Rev. Lett. 107: 215702 (2011)] assembles for truncations as high as 0.45. The self-assembly propensities for the structures formed in the thermodynamic limit are explained using the isoperimetric quotient of the particles and the coordination number in the disordered fluid and in the assembled structure.

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Section: Discussionmentioning

confidence: 99%

Packing and self-assembly of truncated triangular bipyramids

et al. 2013

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“…[1][2][3] Ultimately the controlled introduction of multiple functional nanomaterials gives rise to different physical and chemical properties, and may be of potential importance for the development of smart polymeric materials in industrial and biomedical applications. [2][3][4] Specifically, bicompartmental particles with different optical, electric, and magnetic characteristics within different compartments…”

Section: Introductionmentioning

confidence: 99%

Compartmentalization of Gold Nanocrystals in Polymer Microparticles using Electrohydrodynamic Co‐Jetting

Lim

Hwang

Uzun

et al. 2010

Macromol. Rapid Commun.

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Polymer particles with micro- and nanoscale anisotropy have received increasing interest for their ability to simultaneously present different physical- and chemical properties. In this communication, we demonstrate that gold nanocrystals (NCs) can be selectively incorporated into one compartment of anisotropic polymer particles. Stable bicompartmental particles were prepared via electrohydrodynamic co-jetting of aqueous nanoparticle suspensions followed by thermal cross-linking. Bicompartmental particle populations with different NC densities were obtained by varying the NC concentration in the jetting suspension. While NC-loaded polymer particles showed different optical properties depending on the NC density, they still maintained discrete interfaces between two compartments. Moreover, the fraction of the bicompartmental particles was higher than 98% based on flow cytometry. This study delineates a new approach for preparation of inorganic/organic composite particles with precisely engineered, anisotropic nanoparticle distributions and may contribute to further developments in emerging scientific areas, such as smart materials or particle-based diagnostics.

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“…The main advantage of electricallyswitchable bio-interfaces is that they provide direct control over the bio-system (non-invasive) and are quantitative. A number of different electroactive groups have been successfully employed to obtain switchable interfaces to control interactions of proteins, peptides, DNA and cells, with the electrode surface modified by various molecules having switchable characters in the form of SAMs and polymeric films (Lahann et al 2003;Mendes 2013;Pranzetti et al 2014;Pranzetti et al 2012;Sun and Lahann 2009). …”

Section: Electrically-switchable Bio-interfacesmentioning

confidence: 99%

Switchable bioelectronics

Parlak

Turner

2016

Biosensors and Bioelectronics

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We review the rapidly emerging field of switchable interfaces and its implications for bioelectronics. We seek to piece together early breakthroughs and key developments, and highlight and discuss the future of switchable bioelectronics by focusing on bio-electrochemical processes based on mimicking and controlling biological environments with external stimuli. All these studies strive to answer a fundamental question: "how do living systems probe and respond to their surroundings? And, following on from that: "how one can transform these concepts to serve the practical world of bioelectronics?" The central obstacle to this vision is the absence of versatile interfaces that are able to control and regulate the means of communication between biological and electronic systems. Here, we review the overall progress made to date in building such interfaces at the level of individual biomolecules and focus on the latest efforts to generate device platforms that integrate bio-interfaces with electronics.

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Dynamically switchable biointerfaces

Cited by 37 publications

References 86 publications

Packing and self-assembly of truncated triangular bipyramids

Packing and self-assembly of truncated triangular bipyramids

Compartmentalization of Gold Nanocrystals in Polymer Microparticles using Electrohydrodynamic Co‐Jetting

Switchable bioelectronics

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