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Video
The lecture commenced with a warm welcome and introduction of the speaker by Prof. CHEN Qingyan, Director of PAIR. Prof. McCulloch kickstarted his presentation by giving a brief overview of the current molecular designs of organic semiconductor polymers for charge transport. He explained how they enable organic thin film transistors to achieve high charge carrier mobility and their applications in flexible screens and other electronic devices. He then elaborated on the molecular characteristics of the indacenodithiophene-co-benzothiadiazole copolymer, a semiconductor polymer that exhibits high carrier mobility and is commonly used in organic transistors.
Prof. McCulloch also emphasised the importance of “conformational coplanarity” and “side chain assisted self-assembly”. These features help enhance one-dimensional transport along the “conjugated polymer backbone” and form sterically free “crossing points”, allowing charges to hop between chains. He further highlighted that current research has shown that the molecular conformation and film microstructure are influenced by the design and processing conditions of organic semiconductor polymers, and these significant findings can help achieve optimal charge transport properties.
Following the presentation was a question-and-answer session moderated by Prof. YAN Feng, Associate Director of the Research Institute for Intelligent Wearable Systems (RI-IWEAR) and Chair Professor of Organic Electronics in the Department of Applied Physics. The audience engaged in a productive discussion with Prof. McCulloch.
Event date: 14/01/2025
Speaker: Prof. Iain McCULLOCH (Princeton University)
Hosted by: PolyU Academy for Interdisciplinary Research
- Subjects:
- Chemistry
- Keywords:
- Organic semiconductors Polymers Charge transfer
- Resource Type:
- Video
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Video
香港理工大學高等研究院於2023年4月21日成功舉辦以「綠色化工與分子篩催化」為題的公開講座(混合模式)。講座由中國工程院院士、中國石化上海石油化工研究院院長楊為民教授主講,吸引了來自亞洲、歐洲、北美10多個國家和地區的120多名現場及網上參加者。講座亦在嗶哩嗶哩、微博等多個社交媒體平台進行直播,在線觀看人數超過11,000人次。
講座由理大協理副校長(研究與創新)王鑽開教授以歡迎辭及講者介紹揭開序幕。楊教授介紹了其團隊在綠色化工領域的研究進展,包括基於分子篩催化材料的綠色化工技術開發與實踐,以及新型分子篩催化材料的應用,並分享了他對行業未來趨勢的展望。 隨後的問答環節由應用物理系客座教授曾適之教授主持,一眾參加者與楊教授進行了富有成果的交流。
- Subjects:
- Chemistry
- Keywords:
- Zeolites Catalysis Zeolite catalysts Green chemistry
- Resource Type:
- Video
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Video
This mini-lecture discusses the science of global warming, impact of greenhouse gases (GHGs) emission to life on earth, and the mitigation strategies for climate change. The Faculty of Applied Science and Textiles (FAST) and the Institute of Textiles & Clothing (ITC) organized the mini-lecture series for more than three years. The lectures aim to enrich students' knowledge in creative perspectives and arouse their interest in Sciences, Fashion and Textiles. In view of the unpredictable development of the COVID-19 pandemic, the upcoming mini-lecture Series will be switched from face-to-face mode to online mode.
- Subjects:
- Chemistry and Environmental Sciences
- Keywords:
- Greenhouse gases Global warming
- Resource Type:
- Video
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Video
This mini-lecture introduces the future battery. The Faculty of Applied Science and Textiles (FAST) and the Institute of Textiles & Clothing (ITC) organized the mini-lecture series for more than three years. The lectures aim to enrich students' knowledge in creative perspectives and arouse their interest in Sciences, Fashion and Textiles. In view of the unpredictable development of the COVID-19 pandemic, the upcoming mini-lecture Series will be switched from face-to-face mode to online mode.
- Subjects:
- Physics and Chemistry
- Keywords:
- Storage batteries
- Resource Type:
- Video
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Video
This mini-lecture focuses on basic analytical chemistry and the science behind Crime Scene Investigation (CSI). The Faculty of Applied Science and Textiles (FAST) and the Institute of Textiles & Clothing (ITC) organized the mini-lecture series for more than three years. The lectures aim to enrich students' knowledge in creative perspectives and arouse their interest in Sciences, Fashion and Textiles. In view of the unpredictable development of the COVID-19 pandemic, the upcoming mini-lecture Series will be switched from face-to-face mode to online mode.
- Subjects:
- Chemistry
- Keywords:
- Forensic sciences Analytical chemistry Crime laboratories
- Resource Type:
- Video
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Others
In this animated object, learners examine synthesis, decomposition, exchange, and reversible reactions.
- Subjects:
- Chemistry
- Keywords:
- Chemical reactions
- Resource Type:
- Others
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Others
In this interactive object, learners examine how to properly dilute hydrochloric acid.
- Subjects:
- Chemistry
- Keywords:
- Hydrochloric acid
- Resource Type:
- Others
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Others
Learners calculate gas density from the standard molar volume and observe how the density increases with the increasing molecular weight of the gas.
- Subjects:
- Chemistry
- Keywords:
- Natural gas -- Measurement
- Resource Type:
- Others
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Others
In this brief object, learners examine the direct relationship between the volume of a gas sample and the number of moles of gas. A problem is presented so students can test their knowledge of Avogadro's Law.
- Subjects:
- Chemistry
- Keywords:
- Natural gas -- Measurement
- Resource Type:
- Others
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Others
In this animated object, learners view hydrogen and hydroxide ions in a solution. A brief quiz on the basic principles of the term pH completes the activity.
- Subjects:
- Chemistry
- Keywords:
- Hydrogen-ion concentration
- Resource Type:
- Others
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Others
Learners view movie clips to determine the solubility of two ionic compounds. They also examine a solubility chart and predict the solubility of compounds.
- Subjects:
- Chemistry
- Keywords:
- Chemical reactions Solubility
- Resource Type:
- Others
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Others
Students solve a molarity problem in a drag and drop exercise.
- Subjects:
- Chemistry
- Keywords:
- Chemical reactions Solution (Chemistry)
- Resource Type:
- Others
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Others
In this animated activity, learners examine what gases are composed of and how their particles interact. They also consider several assumptions that form the basis for the Kinetic Theory of Gases.
- Subjects:
- Chemistry
- Keywords:
- Kinetic theory of gases Gas dynamics
- Resource Type:
- Others
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Others
Learners complete an exercise to match chemical formulas with the names of binary compounds, tertiary compounds, and ions.
- Subjects:
- Chemistry
- Keywords:
- Ionic structure Ions
- Resource Type:
- Others
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Others
Learners combine Boyle's Law and Charles's Law to solve for the pressure, volume, and temperature of a gas sample under two sets of conditions.
- Subjects:
- Chemistry
- Keywords:
- Boyle's law Charles' law Gas laws (Physical chemistry)
- Resource Type:
- Others
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Others
In this interactive object, students examine a type of chemical bond known as the "hydrogen bond."
- Subjects:
- Chemistry
- Keywords:
- Hydrogen bonding
- Resource Type:
- Others
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Others
In this interactive object, learners use the ideal gas law to solve a practice problem.
- Subjects:
- Chemistry
- Keywords:
- Gas laws (Physical chemistry)
- Resource Type:
- Others
-
Video
Learners apply the principles associated with Boyle’s Law.
- Subjects:
- Chemistry
- Keywords:
- Boyle's law Gas laws (Physical chemistry)
- Resource Type:
- Video
-
Others
In this interactive object, the learner practices identifying charges on ions.
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Others
Learners examine the periodic table to identify metallic elements that have either fixed or variable oxidation states.
- Subjects:
- Chemistry
- Keywords:
- Reduction (Chemistry) Chemical reactions Oxidation Oxidation-reduction reaction
- Resource Type:
- Others
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Others
Learners observe that the volume of one mole of any gas is 22.4 L at standard temperature and pressure. An illustration shows that only the mass of the molar volume differs with the identity of the gas.
- Subjects:
- Chemistry
- Keywords:
- Gases Molecular volume
- Resource Type:
- Others
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Others
Learners view an animated presentation showing how the pH level of a cleaning solution is controlled in a closed-loop system in a manufacturing setting. A quiz completes the activity.
- Subjects:
- Chemistry
- Keywords:
- Hydrogen-ion concentration
- Resource Type:
- Others
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Others
Learners view an explanation of how to read a graduated cylinder by measuring the lowest portion of the meniscus. A quiz completes the activity.
- Subjects:
- Chemistry
- Keywords:
- Volume (Cubic content) Weights measures
- Resource Type:
- Others
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Others
Students identify the parts of a triple beam balance and practice measuring the mass of objects.
- Subjects:
- Chemistry
- Keywords:
- Weights measures Balances (Weighing instruments)
- Resource Type:
- Others
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Others
Learners follow a four-step process to determine the empirical formula of a compound from the masses of its constituent elements. The molecular formula is determined in a fifth step using the molecular weight of the compound.
- Subjects:
- Chemistry
- Keywords:
- Molecular weights Chemistry Physical theoretical
- Resource Type:
- Others
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Video
Students use algebra to rearrange formulas and solve for the missing volume, density, or mass quantity.
- Subjects:
- Chemistry
- Keywords:
- Chemistry -- Mathematics
- Resource Type:
- Video
-
Video
In this animated and interactive object, learners examine the inverse proportionality of wavelength and frequency and their relationship to the speed of light.
- Subjects:
- Chemistry
- Keywords:
- Electromagnetic waves
- Resource Type:
- Video
-
Others
In this well-illustrated object, learners examine the structures and properties of the four types of solids: molecular, metallic, ionic, and covalent network. Five interactive questions are provided.
- Subjects:
- Chemistry
- Keywords:
- Solid state chemistry
- Resource Type:
- Others
-
Others
Ions are electrically charged particles obtained from an atom or from a chemically bonded group of atoms by adding or removing electrons. Eight examples illustrate the number of protons, neutrons, and electrons in positive ions (cations) and in negative ions (anions).
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Video
Students read brief descriptions of atoms, molecules, elements, and compounds, and complete a matching exercise that pictures these particles and molecules as pieces of taffy.
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Others
Learners observe that the melting of a solid and the freezing of its liquid occur at the same temperature. The melting point is an intrinsic property and is used to identify a substance.
- Subjects:
- Chemistry
- Keywords:
- Melting points Freezing points
- Resource Type:
- Others
-
Others
Learners assign oxidation numbers to atoms in neutral compounds and in polyatomic ions. Six examples are worked through in detail, and three problems are provided.
- Subjects:
- Chemistry
- Keywords:
- Reduction (Chemistry) Chemical reactions Oxidation Oxidation-reduction reaction
- Resource Type:
- Others
-
Others
In this animated object, students examine the role that the solubility of water plays in various biological functions.
- Subjects:
- Chemistry
- Keywords:
- Water chemistry
- Resource Type:
- Others
-
Video
In this screencast, students read about the basic organization and structure of the periodic table of elements. Students identify elements as belonging to a group, a period, or neither.
- Subjects:
- Chemistry
- Keywords:
- Periodic table of the elements Chemical elements
- Resource Type:
- Video
-
Others
Learners view illustrations showing the direct dependence of the volume of a gas on temperature and consider the relationship between the Kelvin and Celsius temperature scales.
- Subjects:
- Chemistry
- Keywords:
- Temperature Low temperatures
- Resource Type:
- Others
-
Video
Learners examine the meaning of theoretical yield, actual yield, and percent yield. They test their knowledge by solving two problems.
- Subjects:
- Chemistry
- Keywords:
- Chemical reactions
- Resource Type:
- Video
-
Video
Viewers watch an introduction to monosaccharides, disaccharides, and polysaccharides. The processes for dehydration synthesis and hydrolysis.
- Subjects:
- Chemistry
- Keywords:
- Carbohydrates Biomolecules Organic compounds
- Resource Type:
- Video
-
Others
In this animated object, students examine the role equilibrium plays in everyday life. Formulas are presented in an interactive way.
- Subjects:
- Chemistry
- Keywords:
- Chemical equilibrium
- Resource Type:
- Others
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Others
Students examine standard pressure in this interactive object.
- Subjects:
- Chemistry
- Keywords:
- Boyle's law Gas laws (Physical chemistry)
- Resource Type:
- Others
-
Others
In this colorful, interactive object, learners examine how materials on the nanoscale compare with those on the macroscale. The focus is on the difference between macroscale and nanoscale gold in both color and melting point.
- Subjects:
- Chemistry
- Keywords:
- Nanoscience
- Resource Type:
- Others
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Others
Learners read the definition of atomic weight and obtain the weights of elements by viewing the Periodic Table and charts that list atomic weights by name or symbol.
- Subjects:
- Chemistry
- Keywords:
- Periodic table of the elements Chemical elements Atomic weights
- Resource Type:
- Others
-
Video
Learners examine the method used to calculate the mass percent of an element in a compound. Three examples and one problem illustrate the method.
- Subjects:
- Chemistry
- Keywords:
- Chemistry -- Notation Chemical elements
- Resource Type:
- Video
-
Others
Learners study the effect that pressure has on boiling temperatures. Once a liquid has reached a full boil, additional heat does not raise the liquid’s temperature; however, pressure can vary the boiling point of a liquid. A brief quiz completes the activity.
- Subjects:
- Chemistry
- Keywords:
- Heat -- Transmission Pressure Boiling-points
- Resource Type:
- Others
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Others
-
Others
Learners view an animation showing how the volume of a given quantity of gas varies directly with its temperature.
- Subjects:
- Chemistry
- Keywords:
- Charles' law Gas laws (Physical chemistry) Gase -- Thermal properties
- Resource Type:
- Others
-
Others
Learners examine graphs and read that the heat of fusion is the heat energy absorbed by one mole of solid as it is converted to liquid, while the heat of vaporization is the heat energy absorbed by one mole of liquid as it is converted to gas.
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Others
Learners examine how the boiling point increases with increasing pressure. An example from industry is given.
- Subjects:
- Chemistry
- Keywords:
- Boiling-points
- Resource Type:
- Others
-
Others
In this animated object, learners examine how gas volume varies directly with absolute temperature (K at constant pressure). An example of a sample of gas at two conditions of volume and temperature is used to illustrate the law.
- Subjects:
- Chemistry
- Keywords:
- Charles' law Gas laws (Physical chemistry) Gase -- Thermal properties
- Resource Type:
- Others
-
Video
Learners identify combination, decomposition, displacement, and combustion types of redox reactions. They also watch a video clip that demonstrates the reaction of sodium and water.
- Subjects:
- Chemistry
- Keywords:
- Reduction (Chemistry) Chemical reactions Oxidation Oxidation-reduction reaction
- Resource Type:
- Video
-
Others
In this interactive object, learners calculate formula and molecular weights by working through five examples and two problems.
- Subjects:
- Chemistry
- Keywords:
- Molecular weights Atomic weights
- Resource Type:
- Others
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