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Ionic current devices—Recent progress in the merging of electronic, microfluidic, and biomimetic structures
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10.1063/1.4804249
/content/aip/journal/bmf/7/3/10.1063/1.4804249
http://aip.metastore.ingenta.com/content/aip/journal/bmf/7/3/10.1063/1.4804249

Figures

Image of FIG. 1.
FIG. 1.

Examples of ionic current rectifying systems. (a) Ionic current rectification in a nanochannel with asymmetric charge distribution. Reproduced with permission from Daiguji , Nano Lett. , 2274 (2005). Copyright 2005 ACS Publications. (b) A cone-shaped nanotube with asymmetric charge distribution. Reproduced with permission from Vlassiouk and Siwy, Nano Lett. , 552 (2007). Copyright 2007 ACS Publications. (c) A polyelectrolyte diode with oppositely charged counter ion carriers. Reproduced with permission from Cayre , J. Am. Chem. Soc. , 10801 (2007). Copyright 2007 ACS publications. (d) A polyelectrolyte diode on a microchip. Reproduced with permission from Han , Angew. Chem., Int. Ed. , 3830 (2009). Copyright 2009 John Wiley & Sons, Ltd. (e) Selective ion transport in a device with the interface of hydrogel/SiO nanofilm. Reproduced with permission from Koo , Small , 1393 (2010). Copyright 2010 John Wiley & Sons, Ltd. (f) Ionic current rectification in an entirely soft device composed of hydrogels and liquid metal. Reproduced with permission from So , Adv. Funct. Mater. , 625 (2012). Copyright 2012 John Wiley & Sons, Ltd.

Image of FIG. 2.
FIG. 2.

Examples of ionic current devices with more complex functionalities. (a) A nanofluidic transistor. Reproduced with permission from Karnik , Nano Lett. , 943 (2005). Copyright 2005 ACS Publications. (b) A hydrogel based photovoltaic cell. Reproduced with permission from Koo , J. Mater. Chem. , 72 (2011). Copyright 2011 the RSC. (c) A soft memristor composed of hydrogels and liquid metal. The graph at the bottom illustrates the resistive switching characteristic of the device. Reproduced with permission from Koo , Adv. Mater. , 3559 (2011). Copyright 2011 John Wiley & Sons, Ltd.

Image of FIG. 3.
FIG. 3.

Examples of functional microfluidic materials. (a) Soft materials of controlled shape and stiffness. Microvascular networks filled with a photocurable polymer allow retaining a pre-defined shape after UV illumination. Reproduced with permission from Chang , Adv. Mater. , 2803 (2009). Copyright 2009 John Wiley & Sons, Ltd. (b) Reversibly deformable microfluidic antenna filled with conducting liquid alloy. Reproduced with permission from So , Adv. Funct. Mater. , 3632 (2009). Copyright 2009 John Wiley & Sons, Ltd. (c) Schematic and optical image of a self-healing microfluidic material filled with a polymerizable healing agent. The healed cracks are visible in the image. Reproduced with permission from Toohey , Nature Mater. , 581 (2007). Copyright 2007 Nature Publishing Group. (d) Color changing soft materials with microfluidic networks. (Top) A microfluidic elastomer sheet demonstrating a color change from red to blue. Reproduced with permission from Uçar and Velev, Soft Matter , 11232 (2012). Copyright 2012 the RSC. (Bottom) A soft robot with microfluidic channels filled with chemiluminescent solution. Reproduced with permission from Morin , Science , 828 (2012). Copyright 2007 AAAS.

Image of FIG. 4.
FIG. 4.

Ionic current devices hosted by microfluidic networks. (a) Integration of memristor elements in a soft matrix by using microfluidic channels. Each intersection of the crossbar array channels acts as one memory node, as shown in the bottom image. Reproduced with permission from Koo , Adv. Mater. , 3559 (2011). Copyright 2011 John Wiley & Sons, Ltd. (b) A schematic of a new photovoltaic concept with biomimetic regeneration functionality. The embedded microfluidic network allows uniform and efficient replacement of photoactive molecules or electrolyte ions.

Tables

Generic image for table
Table I.

Representative means of controlling ionic currents and the corresponding phenomena and applications.

Generic image for table
Table II.

Comparison of the rectification ratios of ionic current diodes reported in the literature.

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/content/aip/journal/bmf/7/3/10.1063/1.4804249
2013-05-09
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Ionic current devices—Recent progress in the merging of electronic, microfluidic, and biomimetic structures
http://aip.metastore.ingenta.com/content/aip/journal/bmf/7/3/10.1063/1.4804249
10.1063/1.4804249
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