[ { "id": "authors:tjeth-vrz18", "collection": "authors", "collection_id": "tjeth-vrz18", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161028-104354237", "type": "book_section", "title": "Second harmonic nanoparticles in imaging applications", "book_title": "Active Photonic Materials IV", "author": [ { "family_name": "Pu", "given_name": "Ye", "clpid": "Pu-Ye" }, { "family_name": "Hsieh", "given_name": "Chia-Lung", "clpid": "Hsieh-Chia-Lung" }, { "family_name": "Grange", "given_name": "Rachel", "clpid": "Grange-R" }, { "family_name": "Yang", "given_name": "Xin", "orcid": "0000-0001-5111-2959", "clpid": "Yang-Xin" }, { "family_name": "Papadopoulos", "given_name": "Ioannis", "clpid": "Papadopoulos-I-N" }, { "family_name": "Choi", "given_name": "Jae-Woo", "clpid": "Choi-Jae-Woo" }, { "family_name": "Psaltis", "given_name": "Demetri", "clpid": "Psaltis-D" } ], "contributor": [ { "family_name": "Subramania", "given_name": "Ganapathi S.", "clpid": "Subramania-G-S" }, { "family_name": "Foteinopoulou", "given_name": "Stavroula", "clpid": "Foteinopoulou-S" } ], "abstract": "Nanocrystals with second harmonic response is a new class of nonlinear optical nanoprobes with dramatically different properties from fluorescent agents. Compared with two-photon fluorescence, second harmonic generation is an ultrafast, lossless, and coherent process. In particular, the absence of photobleaching and emission intermittency in the optical response of the second harmonic nanoparticles is likely to complement the fluorescent agents widely used today in many imaging applications. Furthermore, the coherent emission from the second harmonic generation process provides unique opportunities for the application of coherence domain techniques that are not available with fluorescent agents. We review the application of the second harmonic nanocrystals in imaging applications, especially those pertaining to biomedicine.", "doi": "10.1117/12.894567", "isbn": "9780819487056", "publisher": "Society of Photo-Optical Instrumentation Engineers", "place_of_publication": "Bellingham, WA", "publication_date": "2011-09-12", "pages": "Art. No. 80950E" }, { "id": "authors:7y7k8-01b78", "collection": "authors", "collection_id": "7y7k8-01b78", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161028-152133507", "type": "book_section", "title": "Optofluidic applications with lithium niobate nanowires", "book_title": "Active Photonic Materials III", "author": [ { "family_name": "Grange", "given_name": "Rachel", "clpid": "Grange-R" }, { "family_name": "Choi", "given_name": "Jae-Woo", "clpid": "Choi-Jae-Woo" }, { "family_name": "Hsieh", "given_name": "Chia-Lung", "clpid": "Hsieh-Chia-Lung" }, { "family_name": "Pu", "given_name": "Ye", "clpid": "Pu-Ye" }, { "family_name": "Psaltis", "given_name": "Demetri", "clpid": "Psaltis-D" } ], "contributor": [ { "family_name": "Subramania", "given_name": "Ganapathi S.", "clpid": "Subramania-G-S" }, { "family_name": "Foteinopoulou", "given_name": "Stavroula", "clpid": "Foteinopoulou-S" } ], "abstract": "We report the hydrothermal synthesis of free-standing lithium niobate nanowires. We show that the versatile properties of bulk lithium niobate such as nonlinear optical effects can be exploited at the nanoscale. We describe the fabrication of polydimethylsiloxane (PDMS) microfluidics as well as indium tin oxide (ITO) electrodes with different design for dedicated applications. The control of microfluidic channel dimensions and the corresponding particle concentration is explored. Finally, the selection of fluidic conductivity for optimal dielectrophoretic trapping conditions is discussed.", "doi": "10.1117/12.860401", "isbn": "978-0-81948-252-5", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellingham, WA", "publication_date": "2010-09-10", "pages": "Art. No. 77560H" }, { "id": "authors:e14c9-1qz38", "collection": "authors", "collection_id": "e14c9-1qz38", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20161107-142130622", "type": "book_section", "title": "Tuning parameters of metal ion implantation within a microfluidic channel", "book_title": "Microfluidics, BioMEMS, and Medical Microsystems VIII", "author": [ { "family_name": "Choi", "given_name": "Jae-Woo", "clpid": "Choi-Jae-Woo" }, { "family_name": "Rosset", "given_name": "Samuel", "clpid": "Rosset-S" }, { "family_name": "Niklaus", "given_name": "Muhamed", "clpid": "Niklaus-M" }, { "family_name": "Adleman", "given_name": "James R.", "clpid": "Adleman-J-R" }, { "family_name": "Shea", "given_name": "Herbert", "clpid": "Shea-H" }, { "family_name": "Psaltis", "given_name": "Demetri", "clpid": "Psaltis-D" } ], "contributor": [ { "family_name": "Becker", "given_name": "Holger", "clpid": "Becker-H" }, { "family_name": "Wang", "given_name": "Wanjun", "clpid": "Wang-Wanjun" } ], "abstract": "Applying electrical fields is a simple and versatile method to manipulate and reconfigure optofluidic devices. Several methods to apply electric fields using electrodes on polymers or in the context of lab-on-a-chip devices exist. In this paper, we utilize an ion-implanted process to pattern electrodes within a fluidic channel made of polydimethylsiloxane (PDMS). Electrode structuring within the channel is achieved by ion implantation at a 40\u00b0 angle with a metal shadow mask. In previous work using the ion-implantation process, we demonstrated two possible applications in the context of lab-on-a-chip applications. Asymmetric particles were aligned through electro-orientation. Colloidal focusing and concentration was possible with negative dielectrophoresis. In this paper, we discuss the different electrode structures that are possible by changing the channel dimensions. A second parameter of ion implantation dosage prevents the shorting of electrodes on the side wall or top wall of the fluidic channel to the bottom. This allows for floating electrodes on the side wall or top wall. These type of electrodes help prevent electrolysis as the liquid is not in direct contact with the voltage source. Possible applications of the different electrode structures that are possible are discussed.", "doi": "10.1117/12.842025", "isbn": "978-0-8194-7989-1", "publisher": "Society of Photo-Optical Instrumentation Engineers", "place_of_publication": "Bellingham, WA", "publication_date": "2010-02-17", "pages": "Art. No. 75930D" }, { "id": "authors:en0be-tm764", "collection": "authors", "collection_id": "en0be-tm764", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20100406-112645598", "type": "article", "title": "3-dimensional electrode patterning within a microfluidic channel using metal ion implantation", "author": [ { "family_name": "Choi", "given_name": "Jae-Woo", "clpid": "Choi-Jae-Woo" }, { "family_name": "Rosset", "given_name": "Samuel", "clpid": "Rosset-Samuel" }, { "family_name": "Niklaus", "given_name": "Muhamed", "clpid": "Niklaus-Muhamed" }, { "family_name": "Adleman", "given_name": "James R.", "clpid": "Adleman-J-R" }, { "family_name": "Shea", "given_name": "Herbert", "clpid": "Shea-Herbert" }, { "family_name": "Psaltis", "given_name": "Demetri", "clpid": "Psaltis-D" } ], "abstract": "The application of electrical fields within a microfluidic channel enables many forms of manipulation necessary for lab-on-a-chip devices. Patterning electrodes inside the microfluidic channel generally requires multi-step optical lithography. Here, we utilize an ion-implantation process to pattern 3D electrodes within a fluidic channel made of polydimethylsiloxane (PDMS). Electrode structuring within the channel is achieved by ion implantation at a 40\u00b0 angle with a metal shadow mask. The advantages of three-dimensional structuring of electrodes within a fluidic channel over traditional planar electrode designs are discussed. Two possible applications are presented: asymmetric particles can be aligned in any of the three axial dimensions with electro-orientation; colloidal focusing and concentration within a fluidic channel can be achieved through dielectrophoresis. Demonstrations are shown with E. coli, a rod shaped bacteria, and indicate the potential that ion-implanted microfluidic channels have for manipulations in the context of lab-on-a-chip devices.", "doi": "10.1039/b917719a", "issn": "1473-0197", "publisher": "Royal Society of Chemistry", "publication": "Lab on a Chip", "publication_date": "2010", "series_number": "6", "volume": "10", "issue": "6", "pages": "783-788" }, { "id": "authors:jnh54-m9654", "collection": "authors", "collection_id": "jnh54-m9654", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20091030-080315884", "type": "article", "title": "Lithium niobate nanowires synthesis, optical properties, and manipulation", "author": [ { "family_name": "Grange", "given_name": "Rachel", "clpid": "Grange-Rachel" }, { "family_name": "Choi", "given_name": "Jae-Woo", "clpid": "Choi-Jae-Woo" }, { "family_name": "Hsieh", "given_name": "Chia-Lung", "clpid": "Hsieh-Chia-Lung" }, { "family_name": "Pu", "given_name": "Ye", "clpid": "Pu-Ye" }, { "family_name": "Magrez", "given_name": "Arnaud", "clpid": "Magrez-A" }, { "family_name": "Smajda", "given_name": "Rita", "clpid": "Smajda-Rita" }, { "family_name": "Forr\u00f3", "given_name": "L\u00e1szl\u00f3", "clpid": "Forr\u00f3-L\u00e1szl\u00f3" }, { "family_name": "Psaltis", "given_name": "Demetri", "clpid": "Psaltis-D" } ], "abstract": "Free-standing lithium niobate nanowires (LiNbO_3) are synthesized by the hydrothermal route. The polarization response of the second harmonic generation (SHG) signal is measured in a single nanowire and used to identify the crystal orientation by matching with bulk LiNbO_3 nonlinear optical susceptibility. The electrical manipulation of a LiNbO_3 nanowire and its monitoring through the SHG signal in a fluidic setup are demonstrated.", "doi": "10.1063/1.3236777", "issn": "0003-6951", "publisher": "American Institute of Physics", "publication": "Applied Physics Letters", "publication_date": "2009-10-05", "series_number": "14", "volume": "95", "issue": "14", "pages": "Art. No. 143105" }, { "id": "authors:tegzg-n4t85", "collection": "authors", "collection_id": "tegzg-n4t85", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:CHOoe06", "type": "article", "title": "Optical detection of asymmetric bacteria utilizing electro orientation", "author": [ { "family_name": "Choi", "given_name": "Jae-Woo", "clpid": "Choi-Jae-Woo" }, { "family_name": "Pu", "given_name": "Allen", "clpid": "Pu-Allen" }, { "family_name": "Psaltis", "given_name": "Demetri", "clpid": "Psaltis-D" } ], "abstract": "We propose a bacterial detection scheme which uses no biochemical markers and can be applied in a Point-of-Care setting. The detection scheme aligns asymmetric bacteria with an electric field and detects the optical scattering.", "doi": "10.1364/OE.14.009780", "issn": "1094-4087", "publisher": "Optical Society of America", "publication": "Optics Express", "publication_date": "2006-10-16", "series_number": "21", "volume": "14", "issue": "21", "pages": "9780-9785" }, { "id": "authors:j05kv-wsh89", "collection": "authors", "collection_id": "j05kv-wsh89", "cite_using_url": "https://resolver.caltech.edu/CaltechAUTHORS:20190712-130700020", "type": "book_section", "title": "Optical detection of asymmetric bacteria utilizing electro-orientation", "book_title": "Optofluidics", "author": [ { "family_name": "Choi", "given_name": "Jae-Woo", "clpid": "Choi-Jae-Woo" }, { "family_name": "Pu", "given_name": "Allen", "clpid": "Pu-Allen" }, { "family_name": "Psaltis", "given_name": "Demetri", "clpid": "Psaltis-D" } ], "contributor": [ { "family_name": "Psaltis", "given_name": "Demetri", "clpid": "Psaltis-D" }, { "family_name": "Fainman", "given_name": "Yeshaiahu", "clpid": "Fainman-Yeshaiahu" } ], "abstract": "We propose a bacterial detection scheme which uses no biochemical markers and can be applied in a Point-of-Care setting. The detection scheme aligns asymmetric bacteria with an electric field and detects the optical scattering.", "doi": "10.1117/12.681103", "isbn": "9780819464088", "publisher": "Society of Photo-Optical Instrumentation Engineers (SPIE)", "place_of_publication": "Bellingham, WA", "publication_date": "2006-09-13", "pages": "Art. No. 63290I" } ]