Nucleation is the first step in the formation of either a new thermodynamic phase or a new structure via self-assembly or self-organization. Nucleation is typically defined to be the process that determines how long an observer has to wait before the new phase or self-organized structure appears. Nucleation is often found to be very sensitive to impurities in the system. Because of this, it is often important to distinguish between heterogeneous nucleation and homogeneous nucleation. Heterogeneous nucleation occurs at nucleation sites on surfaces in the system. Homogeneous nucleation occurs away from a surface.
Characteristics of nucleation
Nucleation is usually a stochastic process, so even in two identical systems nucleation will occur at different times. This behaviour is similar to radioactive decay. A common mechanism is illustrated in the animation to the right. This shows nucleation of a new phase (shown in red) in an existing phase (white). In the existing phase microscopic fluctuations of the red phase appear and decay continuously, until an unusually large fluctuation of the new red phase is so large it is more favourable for it to grow than to shrink back to nothing. This nucleus of the red phase then grows and converts the system to this phase. The standard theory that describes this behaviour for the nucleation of a new thermodynamic phase is called classical nucleation theory.
Water doesn’t always freeze when it’s supposed to. Learn about supercooling, and how to supercool a bottle of water at home -- and then turn it to ice instantly!
Hosted by: Michael Aranda
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published: 10 Nov 2014
Nucleation and crystal growth
In this video we explain the processes of nucleation and crystal growth and talk about a good example of this, namely snowflakes. We explain the difference between homogeneous and heterogeneous nucleation and the difference between non-uniform lateral and uniform normal crystal growth. Furthermore, we explain the physics behind homogeneous and heterogeneous nucleation.
****************************************************************
Sources:
Crystal Time Lapse (Canon 550D): https://www.youtube.com/watch?v=caGX6PoVneU, published by ThunderZTRM
Microscopic Time-Lapse of Growing Snowflake - Vyacheslav Ivanov (2014):
https://www.youtube.com/watch?v=GlQVkZA5j-A, published by ART KOSEKOMA
published: 10 Dec 2018
Instant Ice! (Super-cooled water nucleation)
These purified water bottles have been sitting in an unheated house for weeks in sub-zero Fahrenheit weather temperatures. Lacking any particles, or nucleus, to attach to, the water molecules merely supercool instead of crystallizing. But a firm impact forces the molecules to crystallize via a process called nucleation, essentially becoming their own nucleus. Science!!! (It's freakin' freezing...!)
published: 17 Feb 2015
What is NUCLEATION? What does NUCLEATION mean? NUCLEATION meaning, definition & explanation
✪✪✪✪✪ http://www.theaudiopedia.com ✪✪✪✪✪
What is NUCLEATION? What does NUCLEATION mean? NUCLEATION meaning - NUCLEATION pronunciation - NUCLEATION definition - NUCLEATION explanation - How to pronounce NUCLEATION?
Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license.
SUBSCRIBE to our Google Earth flights channel - https://www.youtube.com/channel/UC6UuCPh7GrXznZi0Hz2YQnQ
Nucleation is the first step in the formation of either a new thermodynamic phase or a new structure via self-assembly or self-organization. Nucleation is typically defined to be the process that determines how long an observer has to wait before the new phase or self-organized structure appears. For example, if a volume of water is cooled (at atmospheric pressure) below 0...
published: 11 Feb 2018
Nucleation
published: 16 Jun 2017
Nucleation and Growth
published: 29 May 2017
Ice Nucleation
Post-doc’ Dr Tom Whale shows how water can be supercooled below 0 degrees but remain a liquid until it receives a kinetic energy kick!
Filmed and edited by Ben Pickering
Water doesn’t always freeze when it’s supposed to. Learn about supercooling, and how to supercool a bottle of water at home -- and then turn it to ice instantly...
Water doesn’t always freeze when it’s supposed to. Learn about supercooling, and how to supercool a bottle of water at home -- and then turn it to ice instantly!
Hosted by: Michael Aranda
----------
Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: http://dftba.com/scishow
Or help support us by subscribing to our page on Subbable: https://subbable.com/scishow
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Water doesn’t always freeze when it’s supposed to. Learn about supercooling, and how to supercool a bottle of water at home -- and then turn it to ice instantly!
Hosted by: Michael Aranda
----------
Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: http://dftba.com/scishow
Or help support us by subscribing to our page on Subbable: https://subbable.com/scishow
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Looking for SciShow elsewhere on the internet?
Facebook: http://www.facebook.com/scishow
Twitter: http://www.twitter.com/scishow
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Thanks Tank Tumblr: http://thankstank.tumblr.com
Sources:
In this video we explain the processes of nucleation and crystal growth and talk about a good example of this, namely snowflakes. We explain the difference betw...
In this video we explain the processes of nucleation and crystal growth and talk about a good example of this, namely snowflakes. We explain the difference between homogeneous and heterogeneous nucleation and the difference between non-uniform lateral and uniform normal crystal growth. Furthermore, we explain the physics behind homogeneous and heterogeneous nucleation.
****************************************************************
Sources:
Crystal Time Lapse (Canon 550D): https://www.youtube.com/watch?v=caGX6PoVneU, published by ThunderZTRM
Microscopic Time-Lapse of Growing Snowflake - Vyacheslav Ivanov (2014):
https://www.youtube.com/watch?v=GlQVkZA5j-A, published by ART KOSEKOMA
In this video we explain the processes of nucleation and crystal growth and talk about a good example of this, namely snowflakes. We explain the difference between homogeneous and heterogeneous nucleation and the difference between non-uniform lateral and uniform normal crystal growth. Furthermore, we explain the physics behind homogeneous and heterogeneous nucleation.
****************************************************************
Sources:
Crystal Time Lapse (Canon 550D): https://www.youtube.com/watch?v=caGX6PoVneU, published by ThunderZTRM
Microscopic Time-Lapse of Growing Snowflake - Vyacheslav Ivanov (2014):
https://www.youtube.com/watch?v=GlQVkZA5j-A, published by ART KOSEKOMA
These purified water bottles have been sitting in an unheated house for weeks in sub-zero Fahrenheit weather temperatures. Lacking any particles, or nucleus, to...
These purified water bottles have been sitting in an unheated house for weeks in sub-zero Fahrenheit weather temperatures. Lacking any particles, or nucleus, to attach to, the water molecules merely supercool instead of crystallizing. But a firm impact forces the molecules to crystallize via a process called nucleation, essentially becoming their own nucleus. Science!!! (It's freakin' freezing...!)
These purified water bottles have been sitting in an unheated house for weeks in sub-zero Fahrenheit weather temperatures. Lacking any particles, or nucleus, to attach to, the water molecules merely supercool instead of crystallizing. But a firm impact forces the molecules to crystallize via a process called nucleation, essentially becoming their own nucleus. Science!!! (It's freakin' freezing...!)
✪✪✪✪✪ http://www.theaudiopedia.com ✪✪✪✪✪
What is NUCLEATION? What does NUCLEATION mean? NUCLEATION meaning - NUCLEATION pronunciation - NUCLEATION definition -...
✪✪✪✪✪ http://www.theaudiopedia.com ✪✪✪✪✪
What is NUCLEATION? What does NUCLEATION mean? NUCLEATION meaning - NUCLEATION pronunciation - NUCLEATION definition - NUCLEATION explanation - How to pronounce NUCLEATION?
Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license.
SUBSCRIBE to our Google Earth flights channel - https://www.youtube.com/channel/UC6UuCPh7GrXznZi0Hz2YQnQ
Nucleation is the first step in the formation of either a new thermodynamic phase or a new structure via self-assembly or self-organization. Nucleation is typically defined to be the process that determines how long an observer has to wait before the new phase or self-organized structure appears. For example, if a volume of water is cooled (at atmospheric pressure) below 0 °C, it will tend to freeze into ice. Volumes of water cooled only a few degrees below 0 °C often stay completely ice free for long periods of time. At these conditions nucleation of ice is either slow or does not occur at all. However, at lower temperatures ice crystals appear after little or no delay. At these conditions ice nucleation is fast. Nucleation is commonly how first-order phase transitions start, and then it is the start of the process of forming a new thermodynamic phase. By contrast new phases at continuous phase transitions start to form immediately.
Nucleation is often found to be very sensitive to impurities in the system. These impurities may be too small to be seen by the naked eye, but still can control the rate of nucleation. Because of this, it is often important to distinguish between heterogeneous nucleation and homogeneous nucleation. Heterogeneous nucleation occurs at nucleation sites on surfaces in the system. Homogeneous nucleation occurs away from a surface.
✪✪✪✪✪ http://www.theaudiopedia.com ✪✪✪✪✪
What is NUCLEATION? What does NUCLEATION mean? NUCLEATION meaning - NUCLEATION pronunciation - NUCLEATION definition - NUCLEATION explanation - How to pronounce NUCLEATION?
Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license.
SUBSCRIBE to our Google Earth flights channel - https://www.youtube.com/channel/UC6UuCPh7GrXznZi0Hz2YQnQ
Nucleation is the first step in the formation of either a new thermodynamic phase or a new structure via self-assembly or self-organization. Nucleation is typically defined to be the process that determines how long an observer has to wait before the new phase or self-organized structure appears. For example, if a volume of water is cooled (at atmospheric pressure) below 0 °C, it will tend to freeze into ice. Volumes of water cooled only a few degrees below 0 °C often stay completely ice free for long periods of time. At these conditions nucleation of ice is either slow or does not occur at all. However, at lower temperatures ice crystals appear after little or no delay. At these conditions ice nucleation is fast. Nucleation is commonly how first-order phase transitions start, and then it is the start of the process of forming a new thermodynamic phase. By contrast new phases at continuous phase transitions start to form immediately.
Nucleation is often found to be very sensitive to impurities in the system. These impurities may be too small to be seen by the naked eye, but still can control the rate of nucleation. Because of this, it is often important to distinguish between heterogeneous nucleation and homogeneous nucleation. Heterogeneous nucleation occurs at nucleation sites on surfaces in the system. Homogeneous nucleation occurs away from a surface.
Post-doc’ Dr Tom Whale shows how water can be supercooled below 0 degrees but remain a liquid until it receives a kinetic energy kick!
Filmed and edited by Be...
Post-doc’ Dr Tom Whale shows how water can be supercooled below 0 degrees but remain a liquid until it receives a kinetic energy kick!
Filmed and edited by Ben Pickering
Post-doc’ Dr Tom Whale shows how water can be supercooled below 0 degrees but remain a liquid until it receives a kinetic energy kick!
Filmed and edited by Ben Pickering
Water doesn’t always freeze when it’s supposed to. Learn about supercooling, and how to supercool a bottle of water at home -- and then turn it to ice instantly!
Hosted by: Michael Aranda
----------
Like SciShow? Want to help support us, and also get things to put on your walls, cover your torso and hold your liquids? Check out our awesome products over at DFTBA Records: http://dftba.com/scishow
Or help support us by subscribing to our page on Subbable: https://subbable.com/scishow
----------
Looking for SciShow elsewhere on the internet?
Facebook: http://www.facebook.com/scishow
Twitter: http://www.twitter.com/scishow
Tumblr: http://scishow.tumblr.com
Thanks Tank Tumblr: http://thankstank.tumblr.com
Sources:
In this video we explain the processes of nucleation and crystal growth and talk about a good example of this, namely snowflakes. We explain the difference between homogeneous and heterogeneous nucleation and the difference between non-uniform lateral and uniform normal crystal growth. Furthermore, we explain the physics behind homogeneous and heterogeneous nucleation.
****************************************************************
Sources:
Crystal Time Lapse (Canon 550D): https://www.youtube.com/watch?v=caGX6PoVneU, published by ThunderZTRM
Microscopic Time-Lapse of Growing Snowflake - Vyacheslav Ivanov (2014):
https://www.youtube.com/watch?v=GlQVkZA5j-A, published by ART KOSEKOMA
These purified water bottles have been sitting in an unheated house for weeks in sub-zero Fahrenheit weather temperatures. Lacking any particles, or nucleus, to attach to, the water molecules merely supercool instead of crystallizing. But a firm impact forces the molecules to crystallize via a process called nucleation, essentially becoming their own nucleus. Science!!! (It's freakin' freezing...!)
✪✪✪✪✪ http://www.theaudiopedia.com ✪✪✪✪✪
What is NUCLEATION? What does NUCLEATION mean? NUCLEATION meaning - NUCLEATION pronunciation - NUCLEATION definition - NUCLEATION explanation - How to pronounce NUCLEATION?
Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license.
SUBSCRIBE to our Google Earth flights channel - https://www.youtube.com/channel/UC6UuCPh7GrXznZi0Hz2YQnQ
Nucleation is the first step in the formation of either a new thermodynamic phase or a new structure via self-assembly or self-organization. Nucleation is typically defined to be the process that determines how long an observer has to wait before the new phase or self-organized structure appears. For example, if a volume of water is cooled (at atmospheric pressure) below 0 °C, it will tend to freeze into ice. Volumes of water cooled only a few degrees below 0 °C often stay completely ice free for long periods of time. At these conditions nucleation of ice is either slow or does not occur at all. However, at lower temperatures ice crystals appear after little or no delay. At these conditions ice nucleation is fast. Nucleation is commonly how first-order phase transitions start, and then it is the start of the process of forming a new thermodynamic phase. By contrast new phases at continuous phase transitions start to form immediately.
Nucleation is often found to be very sensitive to impurities in the system. These impurities may be too small to be seen by the naked eye, but still can control the rate of nucleation. Because of this, it is often important to distinguish between heterogeneous nucleation and homogeneous nucleation. Heterogeneous nucleation occurs at nucleation sites on surfaces in the system. Homogeneous nucleation occurs away from a surface.
Post-doc’ Dr Tom Whale shows how water can be supercooled below 0 degrees but remain a liquid until it receives a kinetic energy kick!
Filmed and edited by Ben Pickering
Nucleation is the first step in the formation of either a new thermodynamic phase or a new structure via self-assembly or self-organization. Nucleation is typically defined to be the process that determines how long an observer has to wait before the new phase or self-organized structure appears. Nucleation is often found to be very sensitive to impurities in the system. Because of this, it is often important to distinguish between heterogeneous nucleation and homogeneous nucleation. Heterogeneous nucleation occurs at nucleation sites on surfaces in the system. Homogeneous nucleation occurs away from a surface.
Characteristics of nucleation
Nucleation is usually a stochastic process, so even in two identical systems nucleation will occur at different times. This behaviour is similar to radioactive decay. A common mechanism is illustrated in the animation to the right. This shows nucleation of a new phase (shown in red) in an existing phase (white). In the existing phase microscopic fluctuations of the red phase appear and decay continuously, until an unusually large fluctuation of the new red phase is so large it is more favourable for it to grow than to shrink back to nothing. This nucleus of the red phase then grows and converts the system to this phase. The standard theory that describes this behaviour for the nucleation of a new thermodynamic phase is called classical nucleation theory.
Nucleating & clarifying agents are currently in high demand due to the growing requirements for lightweight and durable materials in consumer products and packaging ... Nucleating agents accelerate ...
Particular ice-nucleating proteins produced by certain bacteria have the ability to control the freezing point of water—so efficiently that no other known material can compete ... How ice-nucleating proteins control freezing.
This is partly because of the wide variation in the ice nucleation efficiency of different particle types ... to be represented in global climate models if their ice nucleation efficiency is high enough.
Nucleated living and aspirations of people in owning independent homes even as land remains a constraint is leading to unsustainable living, environmental degradation, and climate change, warned the Economic Survey tabled in Parliament today.
To investigate this crystal nucleation process, the team performed multiscale structural analysis mainly using synchrotron X-rays ... However, the mechanisms behind crystal nucleation and crystal growth ...
