noreply@blogger.com (Nikola Anđelić)Sat, 15 Mar 2025 14:26:49 -0700Blogger http://www.blogger.com167125https://nanotechnologyandsensors.blogspot.com/en-usnonoreply@blogger.comhttps://nanotechnologyandsensors.blogspot.com/2022/01/what-are-nanoparticles.htmlnoreply@blogger.com (Nikola Anđelić)Sun, 9 Jan 2022 14:20:00 -0800tag:blogger.com,1999:blog-3302453878441038362.post-622771950910948805 .text { width: 100%; font-size: 16pt; text-align: justify; text-justify: inter-word; font-style: "Times New Roman"; } The nanoparticles are materials which size is in range from 1 to 100 nm \(\left(1 \left[\mathrm{nm}\right] = 1\times 10^{-9} \left[\mathrm{m}\right]\right)\). 0https://nanotechnologyandsensors.blogspot.com/2021/12/can-molecular-mobile-robots-swim-in.htmlnoreply@blogger.com (Nikola Anđelić)Mon, 6 Dec 2021 13:53:00 -0800tag:blogger.com,1999:blog-3302453878441038362.post-154211862883779728 According to the research recently published in the journal Small, molecular mobile robots can swim in the water. The team from Hokkaido University led by Assistant Professor Yoshiyuki Kageyama had successfully created a microcrystal that utilizes self-continuous reciprocating motion for self-propulsion. Figure 1 – a series of micrographs showing the movement of one of the synthesized 0https://nanotechnologyandsensors.blogspot.com/2017/02/achromatic-flat-lenses-add-more-color.htmlnoreply@blogger.com (Nikola Anđelić)Thu, 9 Feb 2017 12:51:00 -0800tag:blogger.com,1999:blog-3302453878441038362.post-6983718452096423658 A new, flat lens with the ability to focus light with a higher efficiency within the visible spectrum was reported by a team of researchers from the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS) last summer. In order to bend and focus light as it passed, an ultrathin array of nanopillars was used in the lens. The report was acknowledged as a major 0https://nanotechnologyandsensors.blogspot.com/2017/02/carbon-nanotubes-as-transistors.htmlnoreply@blogger.com (Nikola Anđelić)Thu, 9 Feb 2017 12:10:00 -0800tag:blogger.com,1999:blog-3302453878441038362.post-1429474243698062906 Since the discovery of Carbon nanotubes made in 1991 scientists have tried to harness the unique properties of carbon nanotubes.  Some of them are calling it the material of 21. Century because of its extraordinary mechanical, electrical and thermal characteristics. The idea was to create high performance electronics that is faster and consume less power. Of course there was a number 0https://nanotechnologyandsensors.blogspot.com/2017/02/news.htmlnoreply@blogger.com (Nikola Anđelić)Thu, 9 Feb 2017 07:15:00 -0800tag:blogger.com,1999:blog-3302453878441038362.post-7048164053300585106 Achromatic FlatLenses Add More Color to the World of Optics A new, flat lens with the ability to focus light with a higher efficiency within the visible spectrum was reported by a team of researchers from the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS) last summer. In order to bend and focus light as it passed, an ultrathin array of nanopillars was 0https://nanotechnologyandsensors.blogspot.com/2016/09/nanowire-based-sensors.htmlnoreply@blogger.com (Nikola Anđelić)Mon, 19 Sep 2016 07:38:00 -0700tag:blogger.com,1999:blog-3302453878441038362.post-7123821669292212031 In this section of the blog we will describe nanowires, their properties such as electrical, optical, thermoelectric and mechanical. Then we will describe types of fabrication of nanowires and their application in sensing applications. Metallic materials Semiconducting materials, Insulating nanowires and Molecular nanowires composed of organic or inorganic repeating molecular units and 0https://nanotechnologyandsensors.blogspot.com/2016/09/python-tutorials.htmlnoreply@blogger.com (Nikola Anđelić)Tue, 6 Sep 2016 08:08:00 -0700tag:blogger.com,1999:blog-3302453878441038362.post-3127841678747156436 We've trying to include the Python tutorials because it's most simplest tool to work with and it's free. In order to solve some problems related to nanotechnolgy and statistcal physics we've trying to include some tutorials and example algorithms which you can use in order to solve problems. The first section of this Python tutorilas will give some basics about Python and Python programming.So 0https://nanotechnologyandsensors.blogspot.com/2016/09/synthesis-of-quantum-dots.htmlnoreply@blogger.com (Nikola Anđelić)Fri, 2 Sep 2016 07:16:00 -0700tag:blogger.com,1999:blog-3302453878441038362.post-6720113953416140637 Elements of quantum dot synthesis involves the combination of an appropriate metallic or organometallic precursors like zinc, cadmium or mercury species with corresponding chalcogen precursor for example sulfur, selenium or tellurium species in coordinating solvent at high temperature. Solvent used in production process must be stable at high temperatures in order to prevent aggregation of 0https://nanotechnologyandsensors.blogspot.com/2016/09/medical-and-biological-applications-of.htmlnoreply@blogger.com (Nikola Anđelić)Fri, 2 Sep 2016 07:15:00 -0700tag:blogger.com,1999:blog-3302453878441038362.post-8929395078294499732 Gold nanoparticles have range of applications in the medical field. This could be attributed to one or a combination of multiple characteristics. First nanoparticles have the ability to be functionalized with wide range of molecules. This characteristic allows nanoparticles the ability to be functionalized with a wide range of molecules which allows preparation of nanoparticles that are 0https://nanotechnologyandsensors.blogspot.com/2016/09/chemiresistors-based-on-molecularly.htmlnoreply@blogger.com (Nikola Anđelić)Fri, 2 Sep 2016 07:06:00 -0700tag:blogger.com,1999:blog-3302453878441038362.post-7806406450328758941 Chemiresistors is term which is result of combination of two words that is chemical and resistance referring to electrical resistance. Before we give some examples of chemiresistors let’s give a short explanation of working principle. The working principle of chemiresistor is based on molecularly-modified metallic nanoparticles is as follows: Metallic electrodes are connected to a voltage 0https://nanotechnologyandsensors.blogspot.com/2016/09/programmed-assembly-of-functionalized.htmlnoreply@blogger.com (Nikola Anđelić)Fri, 2 Sep 2016 06:39:00 -0700tag:blogger.com,1999:blog-3302453878441038362.post-8919832711976932245 As mentioned earlier one of interesting features of metal nanoparticles is their fascinating optical properties “Hyperlink Missing”. So to control changes in a solution during the production of nanoparticles is to monitor changes in the solution optical properties.  Nanoparticles for the detection of specific DNA The nanoparticles shown in following figure are designed to detect the 0https://nanotechnologyandsensors.blogspot.com/2016/09/properties-of-carbon-nanotubes.htmlnoreply@blogger.com (Nikola Anđelić)Fri, 2 Sep 2016 01:40:00 -0700tag:blogger.com,1999:blog-3302453878441038362.post-672681624646433503 Before we dive into application of carbon nanotubes we’re going to mention some of the amazing properties of carbon nanotubes. The following video gives information about structure and basic properties of carbon nanotubes:  Mechanical Properties of Carbon nanotubes  As you probably heard the carbon nanotubes have unique mechanical properties. The reason for that is because 0https://nanotechnologyandsensors.blogspot.com/2016/09/carbon-nanotubes.htmlnoreply@blogger.com (Nikola Anđelić)Thu, 1 Sep 2016 14:51:00 -0700tag:blogger.com,1999:blog-3302453878441038362.post-1978887466725399366 Figure 1 – Carbon nanotube In this section we’ll talk about carbon nanotubes, their amazing properties,  procedure of producing carbon nanotubes and of course their application in nanosensors. As we know the carbon nanotubes like nanowires are 1 D nanostructures. They are made from carbon and their diameter is just few nanometers while their distance is million times larger 0https://nanotechnologyandsensors.blogspot.com/2016/08/where-to-buy-nanomaterials.htmlnoreply@blogger.com (Nikola Anđelić)Wed, 31 Aug 2016 07:13:00 -0700tag:blogger.com,1999:blog-3302453878441038362.post-8427460870690676390 Since Richard Feymen famous lecture we've come very far in field of nanotechnology. From beginning of 20th century to present time a lot of tools have been developed and they give good foundation to further development in nanotechnology.  So far most of you who are searching for news in nanoscience and nanotechnology have found a huge amount of results published by scientists and 0https://nanotechnologyandsensors.blogspot.com/2016/08/TON.htmlnoreply@blogger.com (Nikola Anđelić)Mon, 29 Aug 2016 12:36:00 -0700tag:blogger.com,1999:blog-3302453878441038362.post-1236809615220307557 In this section we’ll discuss tools that are used to visualize nano-objects that scientists used in nanotechnology. These tools are high-powered microscopes that are working in specific way to visualize objects on atomic scale. Of course we’re talking about AtomicForce Microscopy (AFM), (AFM MODES) ScanningElectron Microscopy (STM) and TransmissionElectron Microscopy (TEM). In this 0https://nanotechnologyandsensors.blogspot.com/2016/08/nanostructures.htmlnoreply@blogger.com (Nikola Anđelić)Fri, 26 Aug 2016 10:50:00 -0700tag:blogger.com,1999:blog-3302453878441038362.post-8834190785791655327 Is defined as an object that has at least one dimension in the range of 1 – 100 nm. In describing nanostructures it is necessary to differentiate between the numbers of nanoscale dimensions: 1) Nanoclusters are sturctures that are 1 to 100 nm in each spatial dimension. These structures are categorized as 0D nanostructures. Some examples of 0D nanostructures include: Qunatum dots, Nanoparticle 0https://nanotechnologyandsensors.blogspot.com/2016/08/QUE.htmlnoreply@blogger.com (Nikola Anđelić)Fri, 19 Aug 2016 09:00:00 -0700tag:blogger.com,1999:blog-3302453878441038362.post-8647586006489698964 Quantum mechanics provides the foundation principles for all molecular processes while molecular statistical mechanics builds upon that foundation, and itself serves as the basis for thermodynamics. Here we’ll develop thermodynamics in a molecular context. Molecules behave quantum mechanically which means that we will need to know some results that are derived from quantum mechanics. Energy is0https://nanotechnologyandsensors.blogspot.com/2016/08/BTOFTHERM.htmlnoreply@blogger.com (Nikola Anđelić)Fri, 19 Aug 2016 09:00:00 -0700tag:blogger.com,1999:blog-3302453878441038362.post-7873969986063567713 Thermodynamics:  The branch of science that deals with the study of different forms of energy and the quantitative relationships between them. System:  Quantity of matter or a region of space which is under consideration in the analysis of a problem. Surroundings:  Anything outside the thermodynamic system is called the surroundings. The system is separated from the 0https://nanotechnologyandsensors.blogspot.com/2016/08/INTOSMT.htmlnoreply@blogger.com (Nikola Anđelić)Thu, 18 Aug 2016 09:00:00 -0700tag:blogger.com,1999:blog-3302453878441038362.post-5815614658991697825 This is introductory lecture into Statistical Thermodynamics and provides some basic concepts. The main focus in these lectures are gases because their easier to explain some key concepts of Statistical Thermodynamics. Besides lectures some solved problems will be provided in order to better understand basic concepts. The Thermite Reaction Figure 1 - Example of Thermite Reaction Will 0https://nanotechnologyandsensors.blogspot.com/2016/08/quantum-dot-sensors.htmlnoreply@blogger.com (Nikola Anđelić)Fri, 12 Aug 2016 06:58:00 -0700tag:blogger.com,1999:blog-3302453878441038362.post-4168101405252027539 Quantum dots, shortly QDs are small semiconducting particles with typical size ranging from 1 nm to 10 nm. These are artificial clusters of semi conductive atoms that have the ability to confine electron motion due to their small size. One of the most important properties of quantum dots is the ability to tune their band gap and therefore to control their absorbance and emission frequencies. 0https://nanotechnologyandsensors.blogspot.com/2016/08/shape-control-of-produced-nanoparticles.htmlnoreply@blogger.com (Nikola Anđelić)Thu, 11 Aug 2016 09:56:00 -0700tag:blogger.com,1999:blog-3302453878441038362.post-2978668628460034609 Shape control is commonly achieved through a two-step process, termed “SEED MEDIATED GROWTH”. At first step the product is uniform spherical seed particles.  These spherical seed particles are composed of densely packed atom with different facets and surface boundaries. Some facets or surface boundaries are energetically stable due to directional considerations or because organic molecules 0https://nanotechnologyandsensors.blogspot.com/2016/08/parameters-for-characterizing-sensors.htmlnoreply@blogger.com (Nikola Anđelić)Thu, 11 Aug 2016 09:55:00 -0700tag:blogger.com,1999:blog-3302453878441038362.post-3555615061062765408 In order to validate the sensor the sensing result are fulfilled by characterizing one or combination of the following parameters: Accuracy – Comparison between the measured results and the true value Precision – Is measure of how scattered the results are around the average value, For a sensors to be accurate and precise, the measures result should be gathered around the average value 0https://nanotechnologyandsensors.blogspot.com/2016/08/classification-of-sensors.htmlnoreply@blogger.com (Nikola Anđelić)Thu, 11 Aug 2016 09:54:00 -0700tag:blogger.com,1999:blog-3302453878441038362.post-7864507197955713181 By type, sensors can be classified as: Optical, Chemical Electro-mechanical Mass sensitive and Biosensors  Optical Sensors Optical sensors can be divided in two main groups and these groups are: Proximity sensors and Ambient light sensors  Proximity Sensors The proximity sensors are designed for use in detecting the presence of an object or motion detection in 0https://nanotechnologyandsensors.blogspot.com/2016/08/supervised-and-unsupervised-machine.htmlnoreply@blogger.com (Nikola Anđelić)Thu, 11 Aug 2016 09:53:00 -0700tag:blogger.com,1999:blog-3302453878441038362.post-1901363891472201175 SUPERVISED MACHINE LEARNING Supervised machine learning takes a known set of input data and known response to the data, and seeks to build a predictor model that generates responsible predictions for the response to new data.  In order to solve a given problem of supervised learning, one has to perform the following steps First step is to determine the type of training examples. Before 0https://nanotechnologyandsensors.blogspot.com/2016/08/a-short-review-of-classical-mechanics.htmlnoreply@blogger.com (Nikola Anđelić)Thu, 11 Aug 2016 09:53:00 -0700tag:blogger.com,1999:blog-3302453878441038362.post-7965466954643901566 Let's roll a ball down the slope. How to describe its motion? Classical Mechanics is a machinery that allows us to answer all these question. Let's reformulate the question from a marble to an electron. Now let's assume that the electron is rolling down some sort of an atomic hill. What goes in that motion? What are the principles that allow us to tell how the electron would behave? Quantum 0