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Cheng HP, Yang TH, Wang JC, Chuang HS. Recent Trends and Innovations in Bead-Based Biosensors for Cancer Detection. SENSORS (BASEL, SWITZERLAND) 2024; 24:2904. [PMID: 38733011 PMCID: PMC11086254 DOI: 10.3390/s24092904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2024] [Revised: 04/29/2024] [Accepted: 04/30/2024] [Indexed: 05/13/2024]
Abstract
Demand is strong for sensitive, reliable, and cost-effective diagnostic tools for cancer detection. Accordingly, bead-based biosensors have emerged in recent years as promising diagnostic platforms based on wide-ranging cancer biomarkers owing to the versatility, high sensitivity, and flexibility to perform the multiplexing of beads. This comprehensive review highlights recent trends and innovations in the development of bead-based biosensors for cancer-biomarker detection. We introduce various types of bead-based biosensors such as optical, electrochemical, and magnetic biosensors, along with their respective advantages and limitations. Moreover, the review summarizes the latest advancements, including fabrication techniques, signal-amplification strategies, and integration with microfluidics and nanotechnology. Additionally, the challenges and future perspectives in the field of bead-based biosensors for cancer-biomarker detection are discussed. Understanding these innovations in bead-based biosensors can greatly contribute to improvements in cancer diagnostics, thereby facilitating early detection and personalized treatments.
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Affiliation(s)
- Hui-Pin Cheng
- Department of Biomedical Engineering, National Cheng Kung University, Tainan 701, Taiwan (T.-H.Y.)
| | - Tai-Hua Yang
- Department of Biomedical Engineering, National Cheng Kung University, Tainan 701, Taiwan (T.-H.Y.)
- Department of Orthopedic Surgery, National Cheng Kung University Hospital, Tainan 704, Taiwan
- Medical Device Innovation Center, National Cheng Kung University, Tainan 701, Taiwan
| | - Jhih-Cheng Wang
- Department of Urology, Chimei Medical Center, Tainan 710, Taiwan
- Department of Electrical Engineering, Southern Taiwan University of Science and Technology, Tainan 710, Taiwan
- School of Medicine, College of Medicine, National Sun Yat-sen University, Kaohsiung 804, Taiwan
| | - Han-Sheng Chuang
- Department of Biomedical Engineering, National Cheng Kung University, Tainan 701, Taiwan (T.-H.Y.)
- Medical Device Innovation Center, National Cheng Kung University, Tainan 701, Taiwan
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2
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Miyagawa A, Oshiyama K, Nagatomo S, Nakatani K. Biosensing of DNA through difference in interaction between microparticle and glass plate based on particle dissociation in a coupled acoustic-gravitational field. Talanta 2024; 268:125369. [PMID: 37918248 DOI: 10.1016/j.talanta.2023.125369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 10/25/2023] [Accepted: 10/27/2023] [Indexed: 11/04/2023]
Abstract
A novel approach for detecting DNA without labeling the target DNA was developed based on the particle dissociation behavior in a combined acoustic-gravitational field. The particles, which are tethered on a glass plate via intermolecular interactions (Fbind), are dissociated by the resultant force of the acoustic radiation force (Fac), which is a function of the applied voltage (V), and the sedimentation force. In this system, V required for particle dissociation is dependent on Fbind. The differences in Fbind were exploited for detecting the target DNA. A glass plate and polystyrene (PS) particles were respectively modified with anchor and capture DNAs. The target DNA induces immobilization of the PS particles on the glass plate through sandwich hybridization, with a large accompanying Fbind. In the absence of the target DNA, the anchor DNA on the glass plate interacted weakly with the capture DNA on the PS particles via direct binding (small Fbind). The particle dissociation behavior varies based on the concentration of the target DNA due to changes in the ratio of the PS particles tethered through direct binding and sandwich hybridization. Target DNA with a length exceeding 12 base pairs (bps) can be detected on the picomolar scale at concentrations of 10-12 to 10-5 M. This detection scheme was applied to a specific sequence of HIV-2 with 20 bps, achieving a picomolar detection limit.
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Affiliation(s)
- Akihisa Miyagawa
- Department of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki, 305-8571, Japan.
| | - Kengo Oshiyama
- Department of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki, 305-8571, Japan.
| | - Shigenori Nagatomo
- Department of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki, 305-8571, Japan
| | - Kiyoharu Nakatani
- Department of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki, 305-8571, Japan
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Das D, Lin CW, Chuang HS. On-chip screening of SARS-CoV-2 cDNA by LAMP-integrated rotational diffusometry. Talanta 2024; 267:125253. [PMID: 37776805 DOI: 10.1016/j.talanta.2023.125253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 09/10/2023] [Accepted: 09/26/2023] [Indexed: 10/02/2023]
Abstract
The unprecedented pandemic has raised the demand for prompt, precise, and large-scale virus detection techniques to control the transmission of contagious illnesses. In this study, a loop-mediated isothermal amplification (LAMP) based on-chip platform was developed to address this challenge using rotational diffusometry and functionalized Janus particles. A recombinant plasmid containing a cDNA sequence of the SARS-CoV-2 non-structural protein 2 (nsp2) gene was employed here as a proof-of-concept for COVID-19 detection. Specifically, designed primers and the functionalized Janus particles were simultaneously loaded on a microfluidic chip to perform the LAMP reaction on a hot plate. The optimal Janus particle concentrations for diffusometric analysis were thoroughly validated, and the performance of the on-chip LAMP reaction was assessed using thermal image analysis. Utilization of the highly sensitive rotational diffusometry achieved a limit of detection of 1 pg/μL in just 10 min with a sample volume of 20 μL. Our method delivered a tenfold higher sensitivity than the conventional method by utilizing only half of its usual required time. Overall, this study proposes a potential nucleic acid (NA) amplification device to aid the rapid diagnosis of various diseases by modifying the primers for different target genes.
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Affiliation(s)
- Dhrubajyoti Das
- Department of Biomedical Engineering, National Cheng Kung University, Tainan, 701, Taiwan
| | - Cheng-Wen Lin
- Department of Medical Laboratory Science and Biotechnology, China Medical University, Taichung, Taiwan; Department of Medical Laboratory Science and Biotechnology, Asia University, Wufeng, Taichung, 413, Taiwan
| | - Han-Sheng Chuang
- Department of Biomedical Engineering, National Cheng Kung University, Tainan, 701, Taiwan; Medical Device Innovation Center, National Cheng Kung University, Tainan, 701, Taiwan.
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Wang Y, Zhao P, Zhang S, Zhu K, Shangguan X, Liu L, Zhang S. Application of Janus Particles in Point-of-Care Testing. BIOSENSORS 2022; 12:bios12090689. [PMID: 36140074 PMCID: PMC9496037 DOI: 10.3390/bios12090689] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 08/20/2022] [Accepted: 08/22/2022] [Indexed: 06/01/2023]
Abstract
Janus particles (JPs), named after the two-faced Roman god, are asymmetric particles with different chemical properties or polarities. JPs have been widely used in the biomedical field in recent years, including as drug carriers for targeted controlled drug release and as biosensors for biological imaging and biomarker detection, which is crucial in the early detection and treatment of diseases. In this review, we highlight the most recent advancements made with regard to Janus particles in point-of-care testing (POCT). Firstly, we introduce several commonly used methods for preparing Janus particles. Secondly, we present biomarker detection using JPs based on various detection methods to achieve the goal of POCT. Finally, we discuss the challenges and opportunities for developing Janus particles in POCT. This review will facilitate the development of POCT biosensing devices based on the unique properties of Janus particles.
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Das D, Lin CW, Kwon JS, Chuang HS. Rotational diffusometric sensor with isothermal amplification for ultra-sensitive and rapid detection of SARS-CoV-2 nsp2 cDNA. Biosens Bioelectron 2022; 210:114293. [PMID: 35477152 PMCID: PMC9020650 DOI: 10.1016/j.bios.2022.114293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 04/08/2022] [Accepted: 04/15/2022] [Indexed: 11/24/2022]
Abstract
In the wake of a pandemic, the development of rapid, simple, and accurate molecular diagnostic tests can significantly aid in reducing the spread of infections. By combining particle imaging with molecular assays, a quick and highly sensitive biosensor can readily identify a pathogen at low concentrations. Here, we implement functionalized particle-enabled rotational diffusometry in combination with loop-mediated isothermal amplification for the rapid detection of the SARS-CoV-2 nsp2 gene in the recombinant plasmid as a proof of concept for COVID-19 diagnostics. By analyzing the images of blinking signals generated by these modified particles, the change in micro-level viscosity due to nucleic acid amplification was measured. The high sensitivity of rotational diffusometry enabled facile detection within 10 min, with a limit of detection of 70 ag/μL and a sample volume of 2 μL. Tenfold higher detection sensitivity was observed for rotational diffusometry in comparison with real-time PCR. In addition, the system stability and the effect of temperature on rotational diffusometric measurements were studied and reported. These results demonstrated the utility of a rotational diffusometric platform for the rapid and sensitive detection of SARS-CoV-2 cDNA fragments.
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Affiliation(s)
- Dhrubajyoti Das
- Department of Biomedical Engineering, National Cheng Kung University, Tainan, 701, Taiwan
| | - Cheng-Wen Lin
- Department of Medical Laboratory Science and Biotechnology, China Medical University, Taichung, Taiwan; Department of Medical Laboratory Science and Biotechnology, Asia University, Wufeng, Taichung 413, Taiwan
| | - Jae-Sung Kwon
- Department of Mechanical Engineering, Incheon National University, Incheon, Republic of Korea.
| | - Han-Sheng Chuang
- Department of Biomedical Engineering, National Cheng Kung University, Tainan, 701, Taiwan; Medical Device Innovation Center, National Cheng Kung University, Tainan, 701, Taiwan; Core Facility Center, National Cheng Kung University, Tainan, 701, Taiwan.
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Development of a Self-Viscosity and Temperature-Compensated Technique for Highly Stable and Highly Sensitive Bead-Based Diffusometry. BIOSENSORS 2022; 12:bios12060362. [PMID: 35735510 PMCID: PMC9221091 DOI: 10.3390/bios12060362] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Revised: 05/22/2022] [Accepted: 05/23/2022] [Indexed: 11/16/2022]
Abstract
Brownian motion, which is a natural phenomenon, has attracted numerous researchers and received extensive studies over the past decades. The effort contributes to the discovery of optical diffusometry, which is commonly used for micro/nano particle sizing. However, the analysis uncertainty caused by the coupling relationship among particle diameter, temperature, and fluid viscosity usually poses a barrier to precise measurement. Preventing random background noise becomes the key to achieving a high level of accuracy in diffusometry detection. Recently, Janus particles have become known as an ideal tool for resolving the rotational Brownian motion. Followed by our previous study, the rotational Brownian motion and the translational Brownian motion can be separately measured using the Janus particles. Accordingly, a simple self-viscosity and temperature-compensated technique based on the delicate removal of temperature and fluid viscosity variations through particle tracking was first proposed in this study. Consequently, the translational Brownian motion was expressed in terms of particle trajectory, whereas the rotational Brownian motion was expressed in terms of the blinking signal from the Janus particles. The algorithm was verified simulatively and experimentally in temperature (10 °C to 40 °C) and viscosity-controlled (1 mPa·s to 5 mPa·s) fields. In an evaluation of biosensing for a target protein, IFN-γ, the limit of detection of the proposed self-compensated diffusometry reached 0.45 pg/mL, whereas its uncertainties of viscosity and temperature were 96 and 15-fold lower than the pure the rotational Brownian motion counterpart, respectively. The results indicated the low-uncertainty and high-accuracy biosensing capability resulting from the self-viscosity and temperature-compensated technique. This research will provide a potential alternative to future similar bead-based immunosensing, which requires ultra-high stability and sensitivity.
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Zhang Y, Yang F, Wei W, Wang Y, Yang S, Li J, Xing Y, Zhou L, Dai W, Dong H. Self-Propelled Janus Mesoporous Micromotor for Enhanced MicroRNA Capture and Amplified Detection in Complex Biological Samples. ACS NANO 2022; 16:5587-5596. [PMID: 35357821 DOI: 10.1021/acsnano.1c10437] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The slow mass transport of the target molecule essentially limits the biosensing performance. Here, we report a Janus mesoporous microsphere/Pt-based (meso-MS/Pt) nanostructure with greatly enhanced target transport and accelerated recognition process for microRNA (miRNA) amplified detection in complex biological samples. The mesoporous MS was synthesized via double emulsion interfacial polymerization, and Pt nanoparticles (PtNPs) were deposited on the half-MS surface to construct Janus meso-MS/Pt micromotor. The heterogeneous meso-MS/Pt with a large surface available was attached to an entropy-driven DNA recognition system, termed meso-MS/Pt/DNA, and the tremendous pores network was beneficial to enhanced receptor-target interaction. It enabled moving around complex biological samples to greatly enhance target miRNA mass transport and accelerate recognition procedure due to the self-diffusiophoretic propulsion. Coupling with the entropy-driven signal amplification, extremely sensitive miRNA detection in Dulbecco's modified Eagle medium (DMEM), and cell lysate without preparatory and washing steps was realized. Given the free preparatory and washing steps, fast mass transport, and amplified capability, the meso-MS/Pt/DNA micromotor provides a promising method for miRNAs analysis in real biological samples.
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Affiliation(s)
- Yufan Zhang
- Research Center for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering; University of Science & Technology Beijing, Beijing 100083, P. R. China
| | - Fan Yang
- Research Center for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering; University of Science & Technology Beijing, Beijing 100083, P. R. China
| | - Wei Wei
- Research Center for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering; University of Science & Technology Beijing, Beijing 100083, P. R. China
| | - Yeyu Wang
- Research Center for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering; University of Science & Technology Beijing, Beijing 100083, P. R. China
| | - Shuangshuang Yang
- Research Center for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering; University of Science & Technology Beijing, Beijing 100083, P. R. China
| | - Jinze Li
- Research Center for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering; University of Science & Technology Beijing, Beijing 100083, P. R. China
| | - Yi Xing
- Research Center for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering; University of Science & Technology Beijing, Beijing 100083, P. R. China
| | - Liping Zhou
- Research Center for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering; University of Science & Technology Beijing, Beijing 100083, P. R. China
| | - Wenhao Dai
- Research Center for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering; University of Science & Technology Beijing, Beijing 100083, P. R. China
| | - Haifeng Dong
- Research Center for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering; University of Science & Technology Beijing, Beijing 100083, P. R. China
- Marshall Laboratory of Biomedical Engineering, Research Center for Biosensor and Nanotheranostic, School of Biomedical Engineering, Health Science Center, Shenzhen University, Guangdong 518060, P. R. China
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Das D, Hsieh HC, Chen CS, Chen WL, Chuang HS. Ultrafast and Sensitive Screening of Pathogens by Functionalized Janus Microbeads‐Enabled Rotational Diffusometry in Combination with Isothermal Amplification. SMALL SCIENCE 2022. [DOI: 10.1002/smsc.202200010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Affiliation(s)
- Dhrubajyoti Das
- Department of Biomedical Engineering National Cheng Kung University Tainan city 70101 Taiwan
| | - Hui-Chen Hsieh
- Department of Biochemistry and Molecular Biology National Cheng Kung University Tainan city 70101 Taiwan
- Institute of Basic Medical Sciences College of Medicine National Cheng Kung University Tainan city 70101 Taiwan
| | - Chang-Shi Chen
- Department of Biochemistry and Molecular Biology National Cheng Kung University Tainan city 70101 Taiwan
- Institute of Basic Medical Sciences College of Medicine National Cheng Kung University Tainan city 70101 Taiwan
| | - Wei-Long Chen
- Department of Biomedical Engineering National Cheng Kung University Tainan city 70101 Taiwan
| | - Han-Sheng Chuang
- Department of Biomedical Engineering National Cheng Kung University Tainan city 70101 Taiwan
- Medical Device Innovation Center National Cheng Kung University Tainan city 70101 Taiwan
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Xu Z, Huang Y, Yin H, Zhu X, Tian Y, Min Q. DNA origami-based protein manipulation systems: From function regulation to biological application. Chembiochem 2021; 23:e202100597. [PMID: 34958167 DOI: 10.1002/cbic.202100597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Revised: 12/18/2021] [Indexed: 11/07/2022]
Abstract
Proteins directly participate in tremendous physiological processes and mediate a variety of cellular functions. However, precise manipulation of proteins with predefined relative position and stoichiometry for understanding protein-protein interactions and guiding cellular behaviors are still challenging. With superior programmability of DNA molecules, DNA origami technology is able to construct arbitrary nanostructures that can accurately control the arrangement of proteins with various functionalities to solve these problems. Herein, starting from the classification of DNA origami nanostructures and the category of assembled proteins, we summarize the existing DNA origami-based protein manipulation systems (PMSs), review the advances on the regulation of their functions, and discuss their applications in cellular behavior modulation and disease therapy. Moreover, the limitations and potential directions of DNA origami-based PMSs are also presented, which may offer guidance for rational construction and ingenious application.
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Affiliation(s)
- Ziqi Xu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering College of Engineering and Applied Sciences, Nanjing University, Nanjing, 210023, China
| | - Yide Huang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering College of Engineering and Applied Sciences, Nanjing University, Nanjing, 210023, China
| | - Hao Yin
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering College of Engineering and Applied Sciences, Nanjing University, Nanjing, 210023, China
| | - Xurong Zhu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering College of Engineering and Applied Sciences, Nanjing University, Nanjing, 210023, China
| | - Ye Tian
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering College of Engineering and Applied Sciences, Nanjing University, Nanjing, 210023, China
| | - Qianhao Min
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering College of Engineering and Applied Sciences, Nanjing University, Nanjing, 210023, China
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Das D, Chen WL, Chuang HS. Rapid and Sensitive Pathogen Detection by DNA Amplification Using Janus Particle-Enabled Rotational Diffusometry. Anal Chem 2021; 93:13945-13951. [PMID: 34618421 DOI: 10.1021/acs.analchem.1c03209] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Rapid and sensitive detection of infectious bacteria is in all-time high demand to prevent the further spread of the infection and allow early medical intervention. In this study, we use rotational diffusometry (RD), a natural phenomenon characterized by Janus particles, to detect pathogens like Escherichia coli by performing amplification of specific genes. This biosensing method is used to measure the change in viscosity of the fluid in the presence and absence of DNA in the solution by capturing images of modified microbeads at 10 Hz by a CCD camera followed by cross-correlation algorithm analysis. Using rotational diffusometry, we have achieved E. coli detection with 50 pg/μL DNA with a measurement time of 30 s and a sample volume of 2 μL. This sensitivity was achieved with 30 thermal cycles for three different amplicons, viz., 84, 147, and 246 bp. Meanwhile, in the case of 10 and 20 thermal cycles, the detection sensitivity was achieved with 0.1 and 1 ng/μL DNA concentrations for a 246 bp amplicon. Compared with conventional PCR, this technique appears to improve the detection time, thereby reaching a turnaround time of less than 60 min. Other studies showed a successful identification of DNA amplification up to 10 thermal cycles with different sizes of amplicons. The effect of DNA concentration, amplicon size, and the number of thermal cycles on the detection of E. coli was examined in detail and represented in the form of three maps. These maps show the clear difference and the advantages of RD method in comparison with conventional PCR. This unconventional and rapid biosensing method can be used further for downstream application of nucleic acid amplification-based pathogen detection and early disease control.
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Affiliation(s)
- Dhrubajyoti Das
- Department of Biomedical Engineering, National Cheng Kung University, Tainan 701, Taiwan
| | - Wei-Long Chen
- Department of Biomedical Engineering, National Cheng Kung University, Tainan 701, Taiwan
| | - Han-Sheng Chuang
- Department of Biomedical Engineering, National Cheng Kung University, Tainan 701, Taiwan.,Medical Device Innovation Center, National Cheng Kung University, Tainan 701, Taiwan
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Giavazzi F, Pal A, Cerbino R. Probing roto-translational diffusion of small anisotropic colloidal particles with a bright-field microscope. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2021; 44:61. [PMID: 33900479 PMCID: PMC8076158 DOI: 10.1140/epje/s10189-021-00063-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Accepted: 03/29/2021] [Indexed: 05/11/2023]
Abstract
Soft and biological materials are often composed of elementary constituents exhibiting an incessant roto-translational motion at the microscopic scale. Tracking this motion with a bright-field microscope becomes increasingly challenging when the particle size becomes smaller than the microscope resolution, a case which is frequently encountered. Here we demonstrate squared-gradient differential dynamic microscopy (SG-DDM) as a tool to successfully use bright-field microscopy to extract the roto-translational dynamics of small anisotropic colloidal particles, whose rotational motion cannot be tracked accurately in direct space. We provide analytical justification and experimental demonstration of the method by successful application to an aqueous suspension of peanut-shaped particles.
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Affiliation(s)
- Fabio Giavazzi
- Dipartimento di Biotecnologie Mediche e Medicina Traslazionale, Università degli Studi di Milano, via F.lli Cervi 93, 20090, Segrate, Italy.
| | - Antara Pal
- Division of Physical Chemistry Department of Chemistry, Lund University, Lund, Sweden
| | - Roberto Cerbino
- Dipartimento di Biotecnologie Mediche e Medicina Traslazionale, Università degli Studi di Milano, via F.lli Cervi 93, 20090, Segrate, Italy
- Faculty of Physics, University of Vienna, Boltzmanngasse 5, 1090, Vienna, Austria
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