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Lokesh M, Nalupurackal G, Roy S, Chakraborty S, Goswami J, Gunaseelan M, Chowdhury IU, Bhallamudi VP, Sinha Mahapatra P, Roy B. Accelerated self assembly of particles at the air-water interface with optically assisted heating due to an upconverting particle. Opt Express 2023; 31:5075-5086. [PMID: 36785459 DOI: 10.1364/oe.481722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Accepted: 01/03/2023] [Indexed: 06/18/2023]
Abstract
Particles can be assembled at the air-water interface due to optically induced local heating. This induces convection currents in the water which brings particles to the surface. We improve the technique by employing an upconverting particle (UCP), which, when illuminated with 975 nm light, not only emits visible emission but also generates heat owing to the poor efficiency of the upconversion process. This induces strong convection currents which makes particles dispersed in the suspension assemble at the interface and immediately under the UCP. We show assembly of polystyrene particles of 1 μm diameter and diamonds of 500 nm diameter bearing Nitrogen-Vacancy (NV) centers around the UCP. We also show, for the first time, that the microdiamonds are assembled within about 30 nm at the bottom of the UCP by utilizing non-radiative energy transfer that reduces the lifetime of the 550 nm emission from about 90 μs to about 50 μs.
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Nalupurackal G, Gunaseelan M, Roy S, Lokesh M, Kumar S, Vaippully R, Singh R, Roy B. A hydro-thermophoretic trap for microparticles near a gold-coated substrate. Soft Matter 2022; 18:6825-6835. [PMID: 36040245 PMCID: PMC7613615 DOI: 10.1039/d2sm00627h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Optical tweezers have revolutionised micromanipulation from physics and biology to material science. However, the high laser power involved in optical trapping can damage biological samples. In this context, indirect trapping of microparticles and objects using fluid flow fields has assumed great importance. It has recently been shown that cells and particles can be turned in the pitch sense by opto-plasmonic heating of a gold surface constituting one side of a sample chamber. We extend that work to place two such hotspots in close proximity to each other to form a very unique configuration of flow fields forming an effective quasi-three-dimensional 'trap', assisted by thermophoresis. This is effectively a harmonic trap confining particles in all three dimensions without relying on other factors to confine the particles close to the surface. We use this to show indirect trapping of different types of upconverting particles and cells, and also show that we can approach a trap stiffness of 40 fN μm-1 indicating a weak confinement regime without relying on feedback.
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Affiliation(s)
- Gokul Nalupurackal
- Department of Physics, Quantum Centres in Diamond and Emergent Materials (QuCenDiEM)-group, Micro Nano and Bio-Fluidics (MNBF)-Group, IIT Madras, Chennai 600036, India.
| | - M Gunaseelan
- Department of Physics, Quantum Centres in Diamond and Emergent Materials (QuCenDiEM)-group, Micro Nano and Bio-Fluidics (MNBF)-Group, IIT Madras, Chennai 600036, India.
| | - Srestha Roy
- Department of Physics, Quantum Centres in Diamond and Emergent Materials (QuCenDiEM)-group, Micro Nano and Bio-Fluidics (MNBF)-Group, IIT Madras, Chennai 600036, India.
| | - Muruga Lokesh
- Department of Physics, Quantum Centres in Diamond and Emergent Materials (QuCenDiEM)-group, Micro Nano and Bio-Fluidics (MNBF)-Group, IIT Madras, Chennai 600036, India.
| | - Sumeet Kumar
- Department of Physics, Quantum Centres in Diamond and Emergent Materials (QuCenDiEM)-group, Micro Nano and Bio-Fluidics (MNBF)-Group, IIT Madras, Chennai 600036, India.
| | - Rahul Vaippully
- Department of Physics, Quantum Centres in Diamond and Emergent Materials (QuCenDiEM)-group, Micro Nano and Bio-Fluidics (MNBF)-Group, IIT Madras, Chennai 600036, India.
| | - Rajesh Singh
- Department of Physics, IIT Madras, Chennai 600036, India.
| | - Basudev Roy
- Department of Physics, Quantum Centres in Diamond and Emergent Materials (QuCenDiEM)-group, Micro Nano and Bio-Fluidics (MNBF)-Group, IIT Madras, Chennai 600036, India.
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Lokesh M, Nalupurackal G, Roy S, Chakraborty S, Goswami J, Gunaseelan M, Roy B. Generation of partial roll rotation in a hexagonal NaYF 4 particle by switching between different optical trapping configurations. Opt Express 2022; 30:28325-28334. [PMID: 35919192 PMCID: PMC7613164 DOI: 10.1364/oe.462932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Accepted: 06/28/2022] [Indexed: 06/15/2023]
Abstract
Typically a rigid body can have three degrees of rotational freedom. Among these, there can be two types of out-of-plane rotational modes, called the pitch and the roll. The pitch motion is typically to turn the particle along an axis orthogonal to the axis of symmetry. However, rotation about the axis of symmetry (called the roll motion) has so far not been shown in optical tweezers. It is here that we use a hexagonal shaped particle (NaYF4) which prefers to align side on with the optical tweezers [Rodriguez-Sevilla et al., Nano Letters 16, 8005 (2016)]. In this work, we find that the stable configuration of the hexagonal particle changes while using one beam and two beams, so that when one of the tweezers beams is switched on and off, the particle tends to switch between the different configurations. Thus we get a controlled roll motion. This is the first time that controlled partial roll motions have been generated in optical tweezers.
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Chakraborty S, Nalupurackal G, Gunaseelan M, Roy S, Lokesh M, Goswami J, Datta P, Mahapatra PS, Roy B. Facets of optically and magnetically induced heating in ferromagnetically doped-NaYF 4 particles. J Phys Commun 2022; 7:065008. [PMID: 37398924 PMCID: PMC7614712 DOI: 10.1088/2399-6528/acde43] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 07/04/2023]
Abstract
Upconverting particles like Yb and Er-doped NaYF4 are known to heat up after illumination with light at pump wavelength due to inefficient upconversion processes. Here we show that NaYF4 particles which have been co-doped not only with Yb and Er but also Fe improves the photothermal conversion efficiency. In addition, we show for the first time that alternating magnetic fields also heat up the ferromagnetic particles. Thereafter we show that a combination of optical and magnetic stimuli significantly increases the heat generated by the particles.
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Affiliation(s)
- Snigdhadev Chakraborty
- Department of Physics, Quantum Centres in Diamond and Emergent Materials (QuCenDiEM)-group, Micro Nano and Bio-Fluidics (MNBF)-Group, Indian Institute of Technology Madras, Chennai, 600036, India
| | - Gokul Nalupurackal
- Department of Physics, Quantum Centres in Diamond and Emergent Materials (QuCenDiEM)-group, Micro Nano and Bio-Fluidics (MNBF)-Group, Indian Institute of Technology Madras, Chennai, 600036, India
| | - M Gunaseelan
- Department of Physics, Quantum Centres in Diamond and Emergent Materials (QuCenDiEM)-group, Micro Nano and Bio-Fluidics (MNBF)-Group, Indian Institute of Technology Madras, Chennai, 600036, India
- Department of Physics, Rathinam Research Hub, Rathinam College of Arts and Science, Coimbatore, 641021, India
| | - Srestha Roy
- Department of Physics, Quantum Centres in Diamond and Emergent Materials (QuCenDiEM)-group, Micro Nano and Bio-Fluidics (MNBF)-Group, Indian Institute of Technology Madras, Chennai, 600036, India
| | - Muruga Lokesh
- Department of Physics, Quantum Centres in Diamond and Emergent Materials (QuCenDiEM)-group, Micro Nano and Bio-Fluidics (MNBF)-Group, Indian Institute of Technology Madras, Chennai, 600036, India
| | - Jayesh Goswami
- Department of Physics, Quantum Centres in Diamond and Emergent Materials (QuCenDiEM)-group, Micro Nano and Bio-Fluidics (MNBF)-Group, Indian Institute of Technology Madras, Chennai, 600036, India
| | - Priyankan Datta
- Department of Mechanical engineering, Indian Institute of Technology Madras, India
| | | | - Basudev Roy
- Department of Physics, Quantum Centres in Diamond and Emergent Materials (QuCenDiEM)-group, Micro Nano and Bio-Fluidics (MNBF)-Group, Indian Institute of Technology Madras, Chennai, 600036, India
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Yamini S, Gunaseelan M, Gangadharan A, Lopez SA, Martirosyan KS, Girigoswami A, Roy B, Manonmani J, Jayaraman S. Upconversion, MRI imaging and optical trapping studies of silver nanoparticle decorated multifunctional NaGdF4:Yb,Er nanocomposite. Nanotechnology 2021; 33. [PMID: 34753112 DOI: 10.1088/1361-6528/ac37e4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Accepted: 11/09/2021] [Indexed: 05/16/2023]
Abstract
The multifunctional upconversion nanoparticles (UCNPs) are fascinating tool for biological applications. In the present work, photon upconverting NaGdF4:Yb,Er and Ag nanoparticles decorated NaGdF4:Yb,Er (NaGdF4:Yb,Er@Ag) nanoparticles were prepared using a simple polyol process. Rietveld refinement was performed for detailed crystal structural and phase fraction analysis. The morphology of the NaGdF4:Yb,Er@Ag was examined using high-resolution transmission electron microscope, which reveals silver nanoparticles of 8 nm in size were decorated over spherical shaped NaGdF4:Yb,Er nanoparticles with a mean particle size of 90 nm. The chemical compositions were confirmed by EDAX and inductively coupled plasma-optical emission spectrometry analyses. The upconversion luminescence (UCL) of NaGdF4:Yb,Er at 980 nm excitation showed an intense red emission. After incorporating the silver nanoparticles, the UCL intensity decreased due to weak scattering and surface plasmon resonance effect. The VSM magnetic measurement indicates both the UCNPs possess paramagnetic behaviour. The NaGdF4:Yb,Er@Ag showed computed tomography imaging. Magnetic resonance imaging study exhibited better T1 weighted relaxivity in the NaGdF4:Yb,Er than the commercial Gd-DOTA. For the first time, the optical trapping was successfully demonstrated for the upconversion NaGdF4:Yb,Er nanoparticle at near-infrared 980 nm light using an optical tweezer setup. The optically trapped UCNP possessing paramagnetic property exhibited a good optical trapping stiffness. The UCL of trapped single UCNP is recorded to explore the effect of the silver nanoparticles. The multifunctional properties for the NaGdF4:Yb,Er@Ag nanoparticle are demonstrated.
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Affiliation(s)
- S Yamini
- Department of Nuclear Physics, University of Madras, Chennai 600 025, Tamil Nadu, India
| | - M Gunaseelan
- Department of Nuclear Physics, University of Madras, Chennai 600 025, Tamil Nadu, India
- Department of Physics, Indian Institute of Technology Madras, Chennai 600 036, Tamil Nadu, India
| | - Ajithkumar Gangadharan
- Department of Physics and Astronomy, University of Texas at San Antonio, San Antonio, TX 78249, United States of America
- Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, Karnataka, India
| | - Silverio A Lopez
- Department of Physics and Astronomy, The University of Texas Rio Grande Valley, 1201 W University Blvd, Brownsville, TX, 78520, United States of America
| | - Karen S Martirosyan
- Department of Physics and Astronomy, The University of Texas Rio Grande Valley, 1201 W University Blvd, Brownsville, TX, 78520, United States of America
| | - Agnishwar Girigoswami
- Faculty of Allied Health Sciences, Chettinad Academy of Research & Education, Kelambakkam, Tamil Nadu, India
| | - Basudev Roy
- Department of Physics, Indian Institute of Technology Madras, Chennai 600 036, Tamil Nadu, India
| | - J Manonmani
- Department of Chemistry, Quaid-E-Millath Government College for Women (Autonomous), Chennai 600 002, Tamil Nadu, India
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Kumar S, Gunaseelan M, Vaippully R, Kumar A, Ajith M, Vaidya G, Dutta S, Roy B. Pitch-rotational manipulation of single cells and particles using single-beam thermo-optical tweezers. Biomed Opt Express 2020; 11:3555-3566. [PMID: 33014551 PMCID: PMC7510922 DOI: 10.1364/boe.392901] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 05/17/2020] [Accepted: 05/21/2020] [Indexed: 05/28/2023]
Abstract
3D pitch rotation of microparticles and cells assumes importance in a wide variety of applications in biology, physics, chemistry and medicine. Applications such as cell imaging and injection benefit from pitch-rotational manipulation. Generation of such motion in single beam optical tweezers has remained elusive due to the complexities of generating high enough ellipticity perpendicular to the direction of propagation. Further, trapping a perfectly spherical object at two locations and subsequent pitch rotation hasn't yet been demonstrated to be possible. Here, we use hexagonal-shaped upconverting particles and single cells trapped close to a gold-coated glass cover slip in a sample chamber to generate complete 360 degree and continuous pitch motion even with a single optical tweezer beam. The tweezers beam passing through the gold surface is partially absorbed and generates a hot-spot to produce circulatory convective flows in the vicinity which rotates the objects. The rotation rate can be controlled by the intensity of the laser light. Thus such a simple configuration can turn the particle in the pitch sense. The circulatory flows in this technique have a diameter of about 5 μm which is smaller than those reported using acousto-fluidic techniques.
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Affiliation(s)
- Sumeet Kumar
- Department of Physics, Indian Institute of Technology Madras, Chennai, 600036, India
| | - M. Gunaseelan
- Department of Physics, Indian Institute of Technology Madras, Chennai, 600036, India
| | - Rahul Vaippully
- Department of Physics, Indian Institute of Technology Madras, Chennai, 600036, India
| | - Amrendra Kumar
- Department of Physics, Indian Institute of Technology Madras, Chennai, 600036, India
| | - Mithun Ajith
- Department of Electrical Engineering, Indian Institute of Technology Madras, Chennai, 600036, India
| | - Gaurav Vaidya
- Department of Physics, Indian Institute of Technology Madras, Chennai, 600036, India
| | - Soumya Dutta
- Department of Electrical Engineering, Indian Institute of Technology Madras, Chennai, 600036, India
| | - Basudev Roy
- Department of Physics, Indian Institute of Technology Madras, Chennai, 600036, India
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Kumaresan T, Gandhinathan R, Ramu M, Gunaseelan M. Biomechanical analysis of implantation of polyamide/hydroxyapatite shifted architecture porous scaffold in an injured femur bone. IJBET 2019. [DOI: 10.1504/ijbet.2019.100273] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Gunaseelan M, Kumaresan T, Gandhinathan R, Ramu M. Biomechanical analysis of implantation of polyamide/hydroxyapatite shifted architecture porous scaffold in an injured femur bone. IJBET 2019. [DOI: 10.1504/ijbet.2019.10022036] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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